Modern flagship smartphones Samsung are equipped with displays with incredible pixel densities, often exceeding Full HD or even 2K standards. By default, the system automatically adjusts resolution to balance picture quality and power consumption, but advanced users may require manual intervention. Changing this parameter allows you to either significantly extend the battery life of the gadget, or, conversely, to squeeze out maximum clarity for viewing content and working with graphics.
In this article we will analyze in detail all the available ways to adjust the display resolution on devices with the shell One UI. You will learn how to use standard developer tools, how to use commands ADB for fine tuning, and what risks there are when changing point density (DPI). Understanding these processes will help you adapt the interface to your individual needs and tasks.
Normal resolution settings in the One UI interface
Let's start with the simplest and safest method, which is available to every device owner without the need to connect to a computer. Engineers Samsung provided a built-in switch in the settings menu that allows you to select one of the preset modes. Typically, the system offers a choice between the maximum resolution (for example, WQHD+) and a more economical option (FHD+).
To access these settings, you need to follow the path Settings → Display → Screen resolution. Here you will see a slider or list of available options. Choosing a lower resolution not only reduces the load on the GPU GPUbut also reduces the amount of data transferred in the frame buffer. This is especially true for models of the series Galaxy S i Note, where the difference in energy consumption between modes can be noticeable.
However, it is worth considering that the standard settings are limited by factory limits. You will not be able to set an arbitrary value different from those provided by the manufacturer. If your goal is simply to save battery life during a long day, this method is sufficient. But for non-standard tasks, such as emulating other devices or specific application testing, you will need more in-depth tools.
⚠️ Attention: When the resolution is lowered, some interface elements may become less clear and fonts may become slightly blurry. This is a normal phenomenon when scaling a picture on a matrix with a high physical pixel density.
Activation of developer mode for advanced options
If the standard menu is not enough for you, the next step is to activate the hidden “For Developers” section. This mode provides access to dozens of technical parameters, including the ability to control the interface scale and debug the graphics subsystem. Activation is done through the menu Settings → Phone information → Software information.
You will need to find the “Build number” item and quickly click on it seven times in a row. After several clicks, the system will ask you to enter your PIN code or pattern unlock key. Once the tap limit is reached, you will see a notification that Developer Mode has been activated. A new item will appear at the very bottom of the main settings menu.
Inside this section, we are interested in the parameters related to rendering. Although there is no direct change in resolution, you can adjust the minimum width (DPI), which will visually change the scale of the elements. Be careful: setting extremely low or high values may make the interface unreadable or completely block access to settings, requiring a data reset.
Write down the current Minimum Width value before changing. The standard value for most Samsung flagships is in the range of 360–411 dp. This will help you quickly return everything back in case of an error.
Changing resolution and DPI through a computer and ADB
For full control over the display parameters, you need to use the toolkit Android Debug Bridge (ADB). This method requires a computer, a USB cable and installed drivers Samsung. By connecting your smartphone in USB debugging mode, you get the opportunity to send system commands that are not available through the GUI.
First of all, make sure that “USB Debugging” is enabled in developer mode. Connect the device to the PC and enter the connection test command in the terminal or command line. If everything is configured correctly, you will see the serial number of your device. Next, you can begin modifying the screen parameters using the utility wm (window manager).
adb shell wm size 1440x2960This command forces the physical screen resolution to be set. You can substitute whatever values your matrix supports, but it's best to stay within the native proportions to avoid distortion. To reset the settings to factory settings, use the command adb shell wm size reset. Managing pixel density through the command works in the same way wm density.
☑️ Preparing to work with ADB
The impact of resolution on performance and battery
Many users wonder how much the reduction in resolution affects the actual operating time of the smartphone. The answer depends on the use cases. In games and heavy graphics applications, the load on GPU reduces in proportion to the decrease in the number of processed pixels. This can give an increase FPS and reduce heating of the case.
In everyday tasks, such as reading text or viewing static images, the difference is less obvious, but still present. Lower resolution means less power consumption on the display controller and memory bus. However, modern AMOLED matrices Samsung are highly efficient, so savings can range from 5% to 15% depending on the brightness and type of content.
| Parameter | WQHD+ (High) | FHD+ (Average) | HD+ (Low) |
|---|---|---|---|
| Text clarity | Maximum | High | Average |
| Load GPU | High | Medium | Low |
| Energy consumption | Maximum | Optimal | Minimum |
| Memory usage | More VRAM | Standard | Less VRAM |
It is worth noting that some applications may not display correctly with non-standard permissions specified via ADB. Video players can stretch the picture, and games can show black bars around the edges. Therefore, before using the new mode permanently, test it in your main apps.
⚠️ Attention: Using ADB commands to set a resolution that is not supported by the hardware (for example, higher than the physical maximum of the matrix) may result in a black screen. In this case, only rebooting the device will help, which will reset the temporary wm settings.
Features of working with the screen refresh rate
Resolution is closely related to another important parameter - the refresh rate (Hz). Flagship models Samsung support adaptive frequency from 48 Hz to 120 Hz. Often, users try to change the resolution to "overclock" the screen, but these settings are adjusted independently of each other in most cases.
However, in some scenarios, the system may force a lower refresh rate when selecting the maximum resolution to prevent overheating. The opposite situation is also possible: when the resolution is reduced to FHD+, the system is more willing to maintain a stable 120 Hz in applications. This is due to the fact that the bandwidth of the display connection interface has its limits.
You can check the current refresh rate using third-party applications like Device Info HW or through special engineering menus called up by dialing codes. The code #0# opens the testing menu, where you can see information about the display, although the ability to change the frequency from there is usually closed to ordinary users.
Secret codes for screen diagnostics
Enter #0# in the “Phone” application to access the engineering menu. Select “Sub Key” or “Sensor” to check the matrix response. The code *#2683662# can open an additional display testing menu on some models.
Possible problems and solutions
After making changes to system parameters, you may encounter a number of artifacts. The most common problem is the keyboard or navigation bar not displaying correctly. If the buttons become too small or move beyond the visible area, go back to the settings DPI and increase the value.
Another common situation is touch desynchronization. This occurs if the resolution change has disrupted the calibration of the sensor layer relative to the graphics output. In such cases, a complete reboot of the device or resetting the access settings (Accessibility), if they were affected, helps.
If you used ADB and the phone froze on the logo after rebooting, do not panic. Parameters wm size and wm density are temporary and are reset upon reboot if they were not registered in system files (which requires rights Root). Just wait a couple of minutes or perform a forced reboot by holding down the power and volume buttons.
⚠️ Attention: One UI is updated regularly. The location of menu items and available ADB commands may change in new versions of Android. Always check the current paths in the official documentation or on developer forums before executing complex commands.
Changing the resolution via ADB is temporary and resets after a reboot, unless you use autorun scripts or superuser rights. This makes the method safe for testing.
Frequently asked questions (FAQ)
Will the resolution be reset after rebooting the smartphone?
If you changed the resolution through the standard settings in the menu, the choice will be saved. If you used the commands adb shell wm size, then after rebooting the device will return to the factory settings, since these commands are valid only in the current session.
Is it possible to increase the resolution above the physical maximum of the screen?
No, it is programmatically impossible to create pixels where they physically do not exist. An attempt to set a value higher than the native resolution of the matrix will either result in an error or cause the system to ignore the command and leave the maximum supported value.
Does changing DPI affect the operation of banking applications?
In rare cases, changing the screen density (DPI) can be considered by security systems of banking applications as a sign of system modification. If the application stops launching, return the default DPI value that was before the changes.
Do you need root access to change the resolution?
To use standard settings and ADB commands, root access is not required. However, in order to change the resolution permanently (so that it does not reset after a reboot) without using initialization scripts, you usually need access to the system partition, which implies superuser rights.
Why did the screen start blinking after changing the resolution?
Blinking may indicate incompatibility of the selected scan timing with the current resolution or a driver conflict. Try reducing the screen refresh rate to 60 Hz or returning the original resolution to fix the problem.