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How to Choose a Mobile Phone
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Mobile phones have many different parameters and choosing the right one can be difficult. Whether you are a manager looking for a device to organise your work, or just looking to buy a new phone for your grandmother, we will help you choose according to the right features. In this article, we are going to introduce you to different categories of mobile phones and parameters that are important to pay attention to.
Several tips for choosing a mobile phone
Decide if you want a smartphone or a classic keypad phone
With a large diagonal, you can enjoy multimedia, games and internet browsing, but large phones are harder to control with one hand
Choose a smartphone that takes beautiful photographs among camera phones
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Choose between rugged models to protect your mobile phone in every weather
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Choose a high-resolution screen if you often use your phone for virtual reality (VR) activities
Mobile phones for seniors feature large buttons and a readable large screen
Chapters of the mobile phone guide
- Smartphones
- Basic smartphone parameters
- Android smartphones
- Apple iPhone
- Camera phones
- Durable phones
- Classic (keypad) phones
- Mobile phones for the elderly
Smartphones
Smartphones have been a huge phenomenon of the last few years. They offer a large, yet reasonably sized touchscreen and the option to choose the applications you want to use, due to a pre-installed operating system (OS). They also offer an integrated camera that goes beyond any camera in a classic phone, a music player, internet access and other life-enhancing features.
Smartphone parameters
Screen
When choosing your phone, think about a screen size that is be optimal for you. If you only use a phone to make calls and send messages, a smaller screen is enough. If you take photos and like browsing through the images you too, we recommend a high resolution and screen diagonal. A smartphone standard today is a Full HD resolution (1920 × 1080) on a 5" to 6" screen.
Usual smartphone screen sizes
Screen technology
OLED screens are the best on the market. They are divided into two categories based on the matrices used.
LCD screens generally have a higher power consumption than OLED screens. However, their design is much cheaper, and therefore we see LCD screens in cheaper models.
The most common resolution
| Screen resolution | Screen resolution size |
|---|---|
| HD | 1 280 × 720px |
| Full HD | 1 920 × 1 080px |
| WQHD | 2 560 × 1 440px |
| 4K | 3 840 × 2 160px |
Operating memory RAM
Every smartphone has its own memory. When choosing a phone, it is one of the most important parameters to consider. The larger the memory size, the faster and easier will it be to handle more operations at a time.
How many GB of memory do I need?
Processor
Processor cores
The most important part of the processor that is responsible for all computational operations. In smartphones, the number of cores usually ranges from 4 to 8, the more cores the better. Multiple cores work better between each other to shorten the processing time.
Processor frequency (clock)
Frequency indicates the number of instructions the processor can perform in 1 second. It is indicated in GHz. Higher frequencies increase the CPU performance. Common frequency values range from 1.6GHz to 2GHz.
What processor do I need?
For the Android operating system today, a quad-core to octa-core processor at 1.5GHz is considered to be a standard. For Apple iPhones with iOS, you do not have to choose from performance-based options, as each model is designed to be swift and smooth. The Windows Phone has minimal demands, therefore a processor that is three times weaker than an Android's one will be enough.
Processor model specification
This is basically only indication that can help you predict the performance of your phone after searching for reviews and benchmarks. For example, a modern quad-core chip may be more powerful than an outdated eight-core.
The best knowm manufacturers
Qualcomm
Their processors and graphics accelerators are particularly praised for their multitasking capability and gaming performance. The company has been manufacturing processors since 2005 and has gone through a long history of mobile engineering. Their Snapdragon processors are also used on flagships of the largest manufacturers, such as Google Pixel, Xiaomi Mi, or some of the Samsung Galaxy S model variants.
MediaTek
The Taiwanese processor maker MediaTek is one of Qualcomm's main competitors. In its portfolio, it has everything through low-cost processors, mid-range chips, futuristic X-series - which reaches up to 3GHz. It boasts plenty of original features such as the patented MiraVision. These processors are very popular with Chinese manufacturers - most notably Xiaomi and Meizu.
Samsung
The Korean electronics company has definitely not stayed behind and is making the processors that are used in their best mobile phones. It often mixes them with Qualcomm's processors, depending on the market the phone is made for.
Apple
Apple does not make nor design its own processors, but hires different companies, especially Samsung and TSMC.
HiSilicon
A Chinese company owned by Huawei. It is the largest printed circuit manufacturer on the Chinese market, and has a great background for the development of new technologies. Unlike other Asian manufacturers, it does not increase performance by the number of computational cores, but improves the core itself.
nVidia
A well-known graphics card player started manufacturing mobile processors a few years ago and is certainly not behind the competition. nVidia processors excel primarily due to their performance in games. The state-of-the-art Tegra X1 is a quad-core chipset with a 256-pixel graphics unit and is therefore used in the Nvidia SHIELD Android TV portable game console. nVidia processors are ideal for all players.
Battery
Battery life is reported in units of mAh (milliampere hour). The higher the number, the greater the capacity. When selecting, consider other aspects that may affect the discharge speed, especially the size of the screen, the CPU performance and the use of data functions. In order to compare the battery life between individual phones as much as possible, the so-called standby time is indicated. This is tested in a laboratory and it is definitely not the real endurance. It is the maximum time that the phone will last for a single charge.
Many phones support the fast charging function. The technology name differs depending on the manufacturer - sometimes you can come across the concept of Rapid Charge, Pump Express, Quick Charge and more. The most common is Qualcomm's Quick Charge 2.0 technology, which can charge the phone's battery from 0 to 60% in about 30 minutes. At the end of 2015, an upgraded version of Quick Charge 3.0 was introduced to charge the phone from 0 to 80% in about 35 minutes.
Camera
Often the most important factor when choosing a mobile phone device is the built-in camera. Whether it's nature, portraits, food, or a self-image, the best mobile cameras are replacing, comparing them with large, compact ones.
Rear/Front Camera
Almost every mobile phone, whether a smartphone or regular keypad phone, is equipped with a rear camera. It generally has a higher resolution, higher luminosity and wider lens, for nature and scene images.
During the last few years, smartphones have also developed a selfie photography trend. The front camera is used for that and also for taking pictures for social media accounts.
Dual camera
It can accelerate focus, increase luminosity, change the focus area, capture the image, and adjust sharpness depth in different ways. A dual camera has many different capabilities and features that depend on specific phone models.
Distinction
This is number of pixels that the resulting photo will contain. It's definitely not a factor that should determine the quality of the camera because the quality is primarily determined by the size of the sensor chip, and there is almost no difference between 14-28Mpx. Even the best manufacturers are more likely to use lower resolution cameras - iPhone 8 (12Mpx + 7Mpx), Galaxy S9 (12Mpx + 8Mpx).
Higher resolution is ideal for large image sizes, but the size of the sensor will be limited and the image quality will be lower in comparison to reflex cameras.
Luminance and aperture
The main camera parameter is not only a megapixel (MPx), but also the luminance. This is indicated by the letter "f". The number behind it indicates the loss of light when passing through the lens. The lower the number, the better the device can handle the light insufficience, which is necessary in order to achieve sharp shots, not only in dim light. Greater luminosity can also create a beautiful blurred background that we all love so much. The ideal smartphone aperture size is around f/2 to f/2.4. The best devices offer a luminance of f/1.7
Video
Mobile phone cameras can also record high-definition videos, often with different features, such as slow-motion or a time lapse video. Most phones record in a Full HD resolution, with the best models handling even 4K.
HDR and scene Modes
Mobile phone cameras work more automatically than manually and feature many different modes for all kinds of occasions.
HDR is a feature that has always been used in photography and is has now found its place in digital photography. It is a combination of photographs of various exposures to produce a high-contrast image.
The panorama mode allows you to capture very wide photos, i.e., the entire view from a tower.
The portrait mode is designed for taking pictures of people, uses the smallest aperture and blurs the background.
Macro mode is used when taking pictures of small objects, such as flowers.
Stabilisation
Because you rarely use a tripod with a mobile phone camera, image stabilisation is an integral part of each camera. It is divided into two categories - Electronic (EIS) and Optical (OIS). Cheaper models have electronic stability that only increases the ISO sensitivity to achieve a shorter shutter speed. The resulting quality of a photo may be theoretically even worse than without applying software stabilisation. OIS, on the other hand, provides much better results, as it is built into the camera.
Autofocus
Any decent camera should support autofocus. Higher-quality phones accelerate short-range sharpening with laser, and detection auto focus (PDAF) for any other kind. The best devices use a combination of both methods. For iPhone, the PDAF variation is called Focus Pixels.
Connectivity and sensors
Connectivity
Nowadays, no smartphone should be missing LTE high-speed Internet support. Most of the local LTE network is built at 800MHz.
Connecting to the Global Positioning System allows you to track your position on maps anywhere on Earth with the accuracy of several metres.
A European and Russian satellite system similar to the american GPS. Galileo should be fully operational by 2019 and achieve more accuracy than GPS.
Internet connection via WiFi wireless technology.
Wireless communication with other devices, especially speakers and headphones. The higher the range, the faster the connection speed and the lower the power consumption.
A way of communication between two electronic devices. It serves for both data and information transmission. It is referred to as the technology of the future and is now used mainly as a substitute for payment cards. Although this technology is not very widespread in the Czech Republic, it is possible to pay for purchases in the United States or the United Kingdom using mobile phones applications such as Google Wallet. Just attach it like a contactless credit card.
It is used to transmit data using infrared radiation. Today it is no longer used as it was replaced by Bluetooth and NFC. However, it still finds its use with a variety of electronics, such as televisions, air conditioners, home music players, etc.
Sockets designed for a data cable connection. The data cable is used to charge or connect the phone to the computer.
Micro USB - The most common connector type, especially for Android phones.
USB-C - A modern USB version, mostly for new smarphones.
Lightning - Exclusively for iPhones.
Sensors
An atmospheric pressure meter. A very useful gadget for smartphones.
If you do not enjoy adjusting the screen brightness, the light sensor will do it for you, so you can see everything you want on the screen.
They monitor the movement and position of the phone. They are particularly used in the gaming industry, but they can also be useful helpers in everyday life - such as a mobile level.
It is used to identify the worlds cardinal points through the Earth's magnetic field.
A very important sensor for every smartphone. When the phone is too close to your face during a call, the screen locks to prevent unwanted contact and ending of the call.
Internal storage and memory cards
Especially for phones without a memory card slot, be careful and choose a slightly larger memory size option. Also, consider that the phone's operating system memory size is not included. If you buy a device with 16GB of memory, take into account that the average operating system occupies approximately 4-5GB of free space, leaving you 11-12GB for your data. In addition, the available storage for Android phones may vary between models and manufacturers, since each manufacturer pre-installs different apps in their phones and uses their own graphical superstructures.
The following memory size variants are offered on the market:
Materials
The material used to make your phone plays an important role in its appearance, durability and price .
Useful features
Fingerprint and retina scanner
If you are worried about the security of the information and files on your mobile phone, these features will take your security to the next level.
AI Assistant
A useful feature built into every operating system. Finds the closest restaurant to you, or makes a call after hearing only a few words. The AI iOS assistant is called Siri, Windows Mobile uses Cortana, and Google has simply named it Google Assistant.
Wireless charging
If you are fed up with entangled wires, think about choosing a phone with wireless charging.
Notification diode
The diode lights up in any colour according to your settings. This is definitely a useful smartphone element!
FM radio
Most mobile phones can use your headphones as a radio signal receiver. Tune in to your favorite station wherever you are!
QWERTY keypad
The entire keypad simplifies and speeds up typing on classic keypad phones. If you write a lot of messages per day and you are interested in a keypad phone, consider this feature!
Dual SIM
Telephones with the ability to use two SIM cards at one time are called Dual SIM. On one card you can have a voice tariff and a data card on the other, or you can use the services of two operators at the same time. A large number of phones allows the use of data services in only one of the SIM card slots. Dual SIM mobile phones are manufactured in both keypad and touch-screen versions.
Increased durability
You can use telephones with increased resistance to moisture or dust without damaging them. The level of resistance is usually indicated by the degree of protection, e.g. IP65 or IP68. The first number indicates resistance to dust penetration and the other to water. You can immerse your IP67 phone into the water for half an hour at a maximum depth of one metre. The rain won't damage it either. The crash resistance required for outdoor and sport activities is judged best by the rubber bumpers on the body of the phone.
Smartphones are the most advanced technology on the market. They are equipped with a wide touchscreen that is ideal for watching videos, playing games, reading books and emails, and last but not least browsing the internet. The modern smartphone also includes a camera, and the best models deliver the image quality of a conventional compact camera.
Advantages and disadvantages
Smartphone operating system
The countless passionate debates on the internet prove that every user defines the "best" operating system a bit differently. If you are still unsure about which OS to choose, we have prepared a clear operating system guide for you.
Smartphones by Price Category
Premium Smartphones
Those are premium phones with the best parameters. In this price category, you will not see the usual plastic construction, as high-quality materials such as metal and glass are standard. Compared to cheaper models, no compromise is made. You will get a high-end camera, a perfect screen, an extremely powerful processor and more than enough RAM memory.
If you want the best of what's on the market today, choose a premium-class mobile phone. At the same time, you can be sure that your new phone will not fade away even among the models introduced during the next few years.
Advantages and disadvantages
- Maximum performance
- First-class screen and camera
- Excellent construction
- Update availability for a longer period of time
- Higher price
Upper Mid-range Smartphones
Smart phones from the so-called upper middle class can be found between a regular smartphone and a premium model. A high-quality design that often matches the best phones on the market is very common. Compared to premium phones, the lower price is mainly due to a worse-quality camera, a weaker processor, a smaller but fully sufficient memory capacity, and the display that does not reach the top quality. However, flagships from the previous year are often included in this price category.
If you want a perfectly-worked and high-performance mobile phone with a high-quality camera, yet the price is an important factor, you can definitely choose from this price category.
Advantages and disadvantages
- High-quality design
- Fully sufficient performance
- A decent camera and screen
- Good price/performance ratio
- Compromise is made compared to the premium models
Mid-range Smartphones
For many users, the middle class of smartphones represents the phones with the perfect price/performance ratio. Some, usually more expensive, models from this price category can boast a metallic construction, a nice Full HD display and sufficient performance for everyday use. Compared to the more expensive smartphones, their camera is often weaker. It is also necessary to expect that their performance may be insufficient after a few years, and at the same time, manufacturers do not usually provide several years of support for these models.
Mid-range phones are often the first choice of new smartphone users. It offers a fairly good quality and performance at a rather low price, but at the cost of making compromise on the performance, design, availability of updates and the camera quality.
Advantages and disadvantages
- Price
- Sufficient performance for regular use
- Relatively good-quality screen
- Later update availability
- Lower performance for demanding applications and games
- Worse camera
Budget Smartphones
The cheapest smartphones offer features known from the premium models, yet at a considerably lower price. They work on the same operating system and they offer the same applications and games. Cheap phones, however, do not achieve the same performance as expensive models, thus all programs may not run as smoothly. The low price is also reflected by the poor-quality camera, a lower-quality design, a lower screen resolution and worse colour rendering.
A cheaper smartphone can be ideal as a second phone, for example for business calls, for children, or for journeys where there is a risk of loss or destruction.
Advantages and disadvantages
- Low price
- Similar features like those of expensive models
- Low power
- Poor-quality camera
- Lower screen resolution
- Bad update availability
- Poor construction quality
Android smartphones are good for almost every regular user. In comparison to other OS, Google's Android operating system allows for a greater customisation and personalisation by the user. At the same time, the widest range of apps and games is available for Android. Smartphones with this operating system are found in all price categories with different sizes and designs. Due to their simplicity and wide range of models, almost everyone can choose a phone that they can afford or simply because they like it.
Advantages and disadvantages
Apple products can always be proud of the high-quality design and fine-tuned software. The Apple iPhone boasts one of the best mobile phone cameras, a high-quality Retina screen and an intuitive iOS operating system. Like all Apple devices, it is ideal for use within the Apple ecosystem. It's a phone that has always been one of the best ones to purchase.
Advantages and disadvantages
Which iPhone model to choose?
iPhone X
The latest iPhone has a unique design. The entire front of the phone is a large 5.8" high-resolution screen. Only the upper part of the screen is cut out due to the front camera and Face ID sensors that replace the Touch ID in the Iphone X. Apart from the unique screen, iPhone X offers the best you can buy, with a dual camera, extreme performance, flawless processing quality and wireless charging.
If you want the best from Apple, you can have the iPhone X. However, you will pay a high price for such a unique and top-of-the-line phone.
Advantages and disadvantages
- Extreme performance
- Unique display
- Top Dual Camera
- Design
- Top-quality processing
- A large sized screen for some
- Absent Touch ID
- Very high price
iPhone 8
The successors of the iPhone 7 are called iPhone 8. The traditional succession marking with the letter "s" has been skipped in this case. This is due to greater changes in comparison to iPhone 7 models, especially the change of the back material from aluminum to glass. This has made it possible to integrate wireless charging. The smaller iPhone 8 has a 4.7" Retina screen and a 12mm rear camera, but the performance and features are the same as in the larger "Plus" model.
If you want the latest compact phone with cutting-edge features, the iPhone 8 is a great choice. You will get the high performance of an iPhone in an easy-to-use body.
Advantages and disadvantages
- Maximum performance
- High-quality 4.7" screen
- Excellent camera
- Top-quality processing
- Older design
- Higher price
iPhone 8 Plus
The larger iPhone 8, which features a large 5.5" display. The Plus model has a dual-screen camera that is not offered in the smaller iPhone 8. The large screen is suitable for viewing multimedia or surfing the internet, but it can also serve as a pocket-sized office that you will always have in your hands.
The successor to the popular Iphone 7 Plus offers significantly higher performance, better camera and wireless charging.
Advantages and disadvantages
- Maximum performance
- High-quality 5.5" screen
- Superb dual camera
- Perfect construction
- Larger dimensions
- Older design
- Higher price
iPhone 7
The iPhone 7 does not even look like a last-year model. It has more than enough power for every application, a camera that is still one of the best, and a superb 4.7" screen, making it relatively compact in size and easy to handle.
It is a perfect phone with a smaller screen for easy operation, high performance and a traditionally flawless design.
Advantages and disadvantages
- High-quality design
- Great performance
- High-quality camera
- 4.7" Retina screen
- Higher price
iPhone 7 Plus
Last year's iPhones are still top-quality devices with premium equipment and quality. The iPhone 7 Plus features a large 5.5" Retina screen, a dual camera and plenty of power performance for the future, with a smooth and intuitive iOS control, all at a lower cost than that of the latest models.
The high-quality iPhone 7 Plus offers superior quality and more than enough performance at a lower price than the latest models. However, it lacks wireless charging and has a slightly worse camera.
Advantages and disadvantages
- Price
- High-quality design
- High performance
- High-quality 5.5" screen
- Larger dimensions
- Common design
The best camera is the one you have with you right now. With camera phones, it may not even be all that bad. Phones that function like cameras have a high-quality camera to capture any snapshot. However, the quality is also good for photos from a family holiday, a celebration or a photoshoot "just for fun." Camera phones have an operating system installed and are therefore marked as smartphones, having all their benefits, such as a great number of available apps and games.
Advantages and disadvantages
Frequently asked questions when choosing a camera phone
Is a camera with more megapixels better?
More megapixels do not necessarily mean a better image. The size of the camera sensor is important. Mobile phones usually have a sensor and more megapixels on a small screen can cause more noise. Upgrading the photo with the mobile phone software deletes minor details. Therefore, the best camera phones have 12-15 Mpx.
Which of the camera's parameters should I focus on?
To assess the camera's quality of the phone, it is good to focus on the luminosity and optical image stabilisation. The luminosity represents the amount of light that falls on the sensor and the f/decimal number. The smaller the number, the more light falls on the sensor, which is particularly useful when taking pictures under dim lighting conditions, for example in the evening. Optical stabilisation is built directly into the optical system of the lens and is significantly more effective than software stabilisation. It reduces the camera shake when holding it in your hand, making the photographs clear.
Is there a difference between smartphones and camera phones?
There is not. Camera phones are smartphones with a high-quality camera.
Durable telephones feature an enhanced IP-certified durability and resistance to dust, water, and even falls. They are available in both classic keypad phones and smartphones. If you like to do sports or outdoor activities while browsing the internet and installing any applications, a smartphone is the perfect option for you. On the other hand, compared to the keypad versions, they have the disadvantage of a significantly shorter battery life and a higher weight.
Advantages and disadvantages
Water-resistant phones
Water-resistant phones have the manufacturer's protection guarantee against water damage. Modern smartphones are relatively often water-resistant with no negative impact on their design.
How is the resistance measure indicated?
An IP rating, such as IP57, is used to express the resistance. The first digits of the "IP" prefix indicate the dust-resistance or more precisely how dust proof it is, and the range is represented from 1 to 6. The second digit stands for water-resistance or waterproofness, and is represented by a range from 1 to 8. The most durable phones on the market are IP68 - they are fully dustproof and waterproof, you can safely immerse yourself at a certain depth for an amount of time specified by the manufacturer, but at the maximu of 1 metre deep for 30 minutes.
Shock-resistant phones
Phones that are shock-resistant are among the most durable ones to purchase. They have an increased resistance to mechanical damage and falls from a certain height and are also water-resistant. Those phones usually have several different reinforcements, a rubberised surface and other protective "jags" at their risk points. They are fit for extreme conditions, such as challenging outdoor activities or working in a risky environment.
Regular keypad phones are reliable in every situation and are ideal if you expect a long battery life from your phone. They are primarily intended for making calls and writing an SMS, which they manage perfectly even with a built-in physical keypad. They can also have an integrated camera, yet of a significantly lower quality than the camera of a smartphone. Due to their low cost and long service life, they are also used as back-up and travel phones.
Advantages and disadvantages
Frequently asked questions when selecting a classic (keypad) phone
Does it make sense to buy a keypad phone nowadays?
It is true that smartphones are now commonly sold, but keypad phones still find their supporters. The keypad design suits many people who like to buy them again and again. Another advantage is their simple control and low cost. Manufacturers remember this and they still present new models, even though their offer is not as extensive as the offer of smartphones.
Can I take a photo with my keypad phone?
A built-in camera is standard even in keypad phones. However, its quality cannot be measured with neither the quality of compact cameras nor the quality of smartphones.
The phones for seniors form a separate category. Their manufacturers focus on practicality and simplicity. In addition, they offer useful features that can even save someone's life. They have large keys and an easy-to-read font that can be easily read without glasses.
Advantages and disadvantages
Frequently asked questions when choosing a mobile phone for seniors
What is an SOS button and how does it work?
The SOS button is for emergency cases and can be assigned one or more contacts, such as family members. When pressed, the phone usually sends an SMS to the contacts, or even calls a chosen contact, such as the emergency number.
How do I select a phone for seniors and what features should I look for?
Even the cheapest models feature large buttons, a contrastive, easy-to-read screen, and a few additional features. In addition to the classic design, flip-phone devices are available at the same price. More expensive models can have a larger screen, Bluetooth support, or a more attractive design.
Some phones come with a practical charging stand, where you can simply place the phone. The user does not have to connect the charger to the phone.
The SOS Locator function featured in some Aligator phones is also useful. When the SOS button is pressed, the phone sends a link to the map with the current location of the user along with an emergency message.
Dictionary of terms - mobile phones
Dual SIM
Dual SIM phones use two GSM modules to enable the use of 2 SIM cards at the same time. On one card you can have a voice tariff and a data card on the other, or you can use the services of two operators at the same time. A large number of phones allow the use of data services in only one of the SIM slots.
Gorilla Glass
It is a type of screen protection that reduces the risk of scratches and breakage. Phone manufacturers always indicate whether they use Gorilla Glass technology, or which generation type in their specifications. Currently, there are 4 generations available, and the latest Gorilla Glass 4 has been on the market since 2014. The 5th generation promises an even better level of protection.
LTE
LTE indicates the 4th generation of the data network. The maximum theoretical data rate for the advanced LTE-A (LTE Advanced) is now up to 375Mbps for downloads and up to 50Mbps for data transmission. In contrast to the networks abroad, most Czech LTE networks are built at 800MHz, so check your phone to see if it supports this frequency.
The LTE network also operates the VoLTE (Voice Over LTE) technology, whoch allows making calls through LTE. This feature must be supported by both your operator and the phone itself. The advantages are a better sound quality and a faster call connection.
The LTE also allows you to use VoWiFi (Voice Over WiFi), which means being able to make calls through WiFi. This technology is often mistaken for VoIP (Voice over IP), which is making calls through the internet. With VoWiFi, the call is connected to the radio part of the network through your home WiFi, and it looks like you are making a call through the regular GSM network. It is especially used in locations where there is very poor signal. Once again, it must be supported by both the operator and the phone.
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