Mobile phone buying guide

Before choosing a mobile phone, it is recommended to have a certain degree of understanding of some parts of the mobile phone! The advantage of this is that, at least when looking at the details of the mobile phone, you will not be fooled by various fancy descriptions, and after having a certain degree of understanding of the mobile phone, it will also be of great help to choosing a mobile phone in the future.

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Regarding the parts of the mobile phone, the following distinguishes them according to their needs and key understanding, mainly as follows

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Mobile phone processors are more often referred to as “SOC” , that is, “ System on Chip” . The mobile phone processor integrates CPU, GPU, SP, ISP, RAM running memory , Wi-Fi controller, baseband chip, audio chip and other chips. Among them, the CPU affects the performance and application of the mobile phone. The GPU determines how high the game performance is. RAM Memory is what we often call “ memory “ or “ storage “.

The current mainstream mobile phone SOC chip manufacturers mainly include Qualcomm, Apple, Huawei, Samsung, and MediaTek .The flagship processors of each company are Snapdragon 865, A13, Kirin 990 5G, Orion Exynos 990, Dimensity 1000+/ Dimensity 1000 . In addition to Apple , the other current mid-range SOC chips are Snapdragon 768G/765G/730G, Kirin 820/810 , Orion Exynos 980, MediaTek G90T/Tenji 1000L/Tenji 820/Tenji 800.

Apple does not have mid-range chips , and only the previous generation flagship or previous generation flagship competes with other mobile phone manufacturers in the high-end market. It is recommended that when purchasing a mobile phone, give priority to the models equipped with the above-mentioned flagship and mid-range SOC.It is recommended that the processor models starting with the Snapdragon 4 series, the Kirin 7 series, and the MediaTek P are not selected or selected.

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RAM running memory

As mentioned above, RAM storage is integrated in the SOC processor. Compared with the computer memory bar, it determines the upper limit of the applications that we can open at the same time when using the mobile phone, and the smoothness of the mobile phone use. The larger the memory, the more tasks that can be processed by the processor.

In addition, the current processing mechanism of the Android system, in order to allow customers to switch multitasking more smoothly, so in general, when the open application is switched to the background, the system will automatically keep the application running in the background, but when the phone is turned on The longer the application, the more applications will stay in the background, and therefore the more waiting time.

Therefore, when the mobile phone RAM has a large enough space, the more applications can reside in the background, so that you will not switch after opening several applications and find that some applications have been killed by the system, it is recommended you for great experience buy at least 8G memory or sufficient budget can be up to 12G/16G operation and storage. In addition, if you often play games, or open more applications but do not like to clean the background, it is recommended to start with 8G space.

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ROM storage

RAM storage determines the number of background applications at the same time, while ROM storage determines the storage capacity and opening speed of the phone.

As the current mobile phone system is increasingly taking up storage capacity and the different calculation methods used by flash memory manufacturers to calculate the capacity, new mobile phones that are often purchased only have about 70% of the marked capacity left after they are turned on.

It is recommended to start with 64G storage, and go up to 128G/256G with sufficient budget.

If you often take pictures, take videos, or cache more TV shows and movies, you can consider 256G or 512G storage space.

Some models can expand the storage capacity through TF memory card and NM memory card.

In addition, the impact of ROM on the fluency of mobile phones is not only in storage capacity, but also in flash memory read and write speeds that will affect the fluency of mobile phones.

There are currently two common ROM specifications eMMC and UFS. Among them, UFS currently used in mobile phones is mainly UFS2.1 and UFS3.0, UFS3.1.

As for UFS2.1 and UFS3.0, the performance of the latter is more than twice that of the former, and the user experience is greatly improved. The speed difference from eMMC4.41 to UFS3.0.

UFS3.1, newly released this year, is faster than UFS3.0 in terms of sequential write speed. The Honor 30 Pro+ is suspected of adopting self-developed SFS1.0 technology, and the flash memory read and write speed is much higher than UFS3.1.


No matter how powerful a mobile phone is and how fast it runs, it is only a small screen that is finally reflected in our eyes. Therefore, the screen is very important for the mobile phone experience and fluency. Choosing a high-quality screen will not only make it more comfortable to watch, but will also protect your eyes. Currently, there are two main types of mainstream screens LCD and OLED.


The screen has a long service life and is more eye-friendly, but the color saturation is not as high as that of an OLED screen. And because the LCD screen is thicker and not flexible, the chin of the current mobile phone using LCD screen is not very narrow. In addition, LCD screens still have two problems. One is that the screen fingerprint has not yet been overcome, and the other is that the screen itself does not emit light and needs backlight support.


The biggest advantage of the screen is that the display effect is more vivid and full, and it has the characteristics of light, thin and flexible. It is currently widely used in full-screen mobile phones. Currently, mobile phones with screen fingerprints and ultra-narrow chins are basically OLED screens. OLED screens also have two problems one is more eye-catching, and the other is that the service life is not as long as LCD.

If you prefer the screen to not hurt your eyes, you can consider LCD screen mobile phones if you prefer colorful screens, full screens, and screen fingerprints, you can consider OLED screen mobile phones. In addition, you can also understand the screen resolution and PPI, refresh rate, pixel density, contrast, color gamut, color gradation, color accuracy, brightness, screen dimming, etc., so that you can distinguish when you see the dazzling screen introduction Good or bad in the end.

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The screen resolution refers to the number of pixels in the vertical and horizontal directions, and the unit is px. The higher the resolution of the mobile phone under the same screen size, the higher the image clarity. At present, the mainstream resolutions of mobile phones are 720P, 1080P, 2K+, and 4K . Among them, 1080P resolution is the most commonly used. It is recommended to avoid 720P resolution mobile phones when choosing mobile phones.

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PPI pixel density

For screens of different sizes, the resolution is not the same, but the definition is the same. Here, the concept of PPI can be introduced. PPI refers to the number of pixels on the diagonal of the screen. The higher the PPI value, the clearer the phone!

Refresh rate

Usually expressed in the form of 60Hz/90Hz/120Hz/144Hz, etc. The amount represents the number of frames that flow through the screen in 1 second. The higher the refresh rate, the overall visual effect will be smoother, whether it is for daily use or Still the game experience will be better (mainly some games such as Peace Elite already support 90 frames/120 frames mode).

5. Battery and charging

Unlike a computer, mobile phones are not plugged in at any time. The scenarios where we use mobile phones are more complicated. Therefore, there must be higher requirements on the battery capacity and charging power of mobile phones. The battery capacity determines the duration of use after fully charged the charging power determines the blood return speed when the battery is insufficient.

The combination of a battery with a capacity of more than 4000 mAh and a fast charge of at least 18W not only ensures sufficient use time, but also a rapid blood return speed.

If the budget is sufficient, you can consider models with super charging power of 27W, 30W, 33W, 44W or even 65W, which charge faster.


Taking pictures is one of the main entertainment functions of mobile phones, but the higher the pixels, the better the imaging. The pixel size can only affect the size of the photo output, so some models with 6400W and 4800W pixels may not take good pictures.


The size of the pixel and the resolution of the photo. The higher the resolution, the more delicate the photo, but the image occupies more storage space.

Lens type

The most common mobile phone camera types currently include ultra-wide-angle, telephoto, periscope telephoto, portrait, macro, depth of field, and unusual color filter lenses. The more lens types a mobile phone has, the more camera modes it supports.

CMOS image sensor

Mobile phone camera is usually composed of PCB motherboard, CMOS sensor, holder, and lens. Among them, CMOS image sensor is a typical solid-state imaging sensor, which converts light signals into electrical signals. At present, common mobile phone CMOS image sensors mainly include Sony IMX700, IMX600y, IMX686, IMX586, IMX582, and Samsung HMX, Samsung GW1, and three GW2.

Optical zoom

The English name of optical zoom is Optical Zoom. The lens is moved to zoom in and out of the scene to be shot. The greater the optical zoom, the farther the scene can be shot. Optical zoom mainly relies on telephoto lenses, among which periscope telephoto lenses have better zoom shooting effects.

Optical image stabilization

The English name of optical image stabilization is Optical image stabilization, so it is generally called OIS optical image stabilization. Through the setting of optical components, it can avoid or reduce the phenomenon of instrument jitter in the process of capturing optical signals, thereby improving imaging quality. Dual OIS optical image stabilization means that both cameras of the mobile phone support optical image stabilization, usually the main camera + telephoto lens, but there are exceptions.

Heat dissipation module

When the mobile phone is running games or other large-scale applications, the mobile phone will get hot, and then it will cause frequency reduction, which greatly affects the gaming experience. This requires the mobile phone to have at least liquid cooling, soaking plate, and graphite , Graphene, copper tube, carbon fiber and built-in fan, etc. one or more heat dissipation methods

Charging module

Mainly includes wired fast charging and wireless charging.

Vibration motor

The vibration brought by a high-quality vibration motor can bring a better experience and immersion in daily use, typing, games, etc. Common vibration motors mainly include linear motors and rotor motors (flat motors), and the vibration effect of linear motors is better than that of rotor motors. Linear motors are divided into X-axis transverse motors and Z-axis longitudinal motors. The X-axis transverse motors are better than the Z-axis longitudinal motors.

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Digital Nomad

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