Smartphones based on Android over time begin to work slower, and applications no longer support older versions of the system. Updating your operating system is a key way to restore your device's performance, gain new features, and, critically, close security vulnerabilities. However, this process is not always intuitive, especially when the manufacturer changes the interface or when the update does not arrive automatically.
In this article we will analyze in detail all update methods operating system: from the standard “over the air” method to manual flashing via a computer. You will learn how to prepare for the procedure so as not to lose data, and what to do if your phone freezes during installation. It is important to understand that each smartphone model has its own nuances, but the general principles remain the same for most devices.
Do not be afraid of the word “firmware”. In most cases, all you need is a few taps on the screen and a stable Wi-Fi connection. However, if you decide to go the more complex route using a PC, you will need to be careful and follow the sequence of steps. Let's start with the simplest and safest method.
Preparing the device for updating
Before clicking the “Update” button, you need to perform a number of preparatory steps. Ignoring this step can lead to the loss of contacts, photos, or even turning your smartphone into a “brick.” First of all, make sure that the battery charge level is at least 50-60%. The process of writing a new system to flash memory is energy-consuming, and a sudden shutdown in the middle of the procedure is fatal.
The second critical step is the creation backup data. Even if the update goes smoothly, glitches happen. Use Google cloud services or save important files to your computer. Also free up space in your internal memory: downloading and unpacking a system image often requires 3 to 5 GB of free space.
⚠️ Attention: If your device has superuser rights (Root) or an unlocked bootloader (Bootloader), standard over-the-air (OTA) updates may not install or may be removed root access. In such cases, special care is required.
☑️ Checklist before updating
Finally, check the stability of the Internet connection. Downloading a 2-3 GB system image via a mobile network is not only expensive, but also risky: if the signal is lost, the download will be interrupted. It is best to use a reliable home network Wi-Fi.
Automatic update over the air (OTA)
The most common and recommended method is update OTA (Over-The-Air). Smartphone manufacturers, such as Samsung, Xiaomi or Google Pixel, provide updates directly to devices when they become available for your model and region.
To check for a new version, go to your device's settings. The path may vary slightly depending on the shell, but the logic is the same. Usually this is section Settings → System → System update or Settings → About phone → Software update. Click the “Check for updates” button.
If the server detects a new version, a description of the changes and a download button will appear on the screen. After downloading, the phone will prompt you to reboot and begin installation. At this point, the device may heat up - this is normal when the processor and memory are active.
If the update does not arrive, try clearing the cache of the Google Play Services application or change the region in the settings (if such a function is available), since updates are often distributed in waves.
Sometimes the system writes that “The latest version is installed,” although you know that the new Android has already been released. This means that the manufacturer has not yet adapted the firmware specifically for your model. In this case, all that remains is to wait for the official notification.
Manual installation via the Recovery menu
If automatic updating does not work or you want to install the firmware before the official release (for example, by downloading a file from the developer forum), you can use the Recoverymode. This method requires downloading a special file with the extension .zipwhich must strictly correspond to your smartphone model.
Copy the downloaded firmware file to the root of the phone's internal memory or to an SD card. Then turn off your device and enter recovery mode. The key combination depends on the manufacturer: most often it is Volume Up + Power or Volume Down + Powerheld simultaneously until the logo appears.
In the Recovery menu, control is carried out with the volume buttons (up/down), and the selection is confirmed with the power button. You need to find the item Apply update from storage or Install from SD card. Select the previously copied zip file and confirm installation.
⚠️ Attention: Never try to install firmware from another phone model, even if the names are similar. This is guaranteed to disable the device, and recovery will require the intervention of a service center.
What to do if Recovery does not see the file?
Make sure that the file has a .zip extension and is in the root of the memory, and not in a folder. Also check whether the file is digitally signed by the manufacturer - stock Recovery will not install unverified modified firmware.
After the process is complete, select Reboot system now. The first boot after manual installation may take up to 10-15 minutes as the system optimizes applications. Do not interrupt this process.
Updating via computer (Fastboot and Odin)
For advanced users or in cases where the phone does not boot normally, there is a method for flashing firmware via a PC. For devices Samsung the app is used Odin, for Xiaomi — Mi Flash Tool, and for pure Android (Pixel, Nexus) - a utility Fastboot.
This method allows you to completely overwrite system partitions, which often helps eliminate deep software errors. You will need to install the ADB and Fastboot drivers on your computer, download the full firmware image (often a 4-6 GB archive) and connect the phone with a USB 3.0 cable.
The process is as follows: the phone is switched to Download Mode (for Samsung) or Fastboot Mode (for others). In the app on the PC, the firmware files are selected and the Start button is pressed. The computer takes care of all the work of recording data.
| Tool | For which brands | Complexity | Risk of data loss |
|---|---|---|---|
| OTA (over the air) | All Android | Low | No (data is saved) |
| Recovery Menu | All Android | Medium | Depends on the firmware type |
| Odin / Mi Flash | Samsung, Xiaomi | High | Yes (full reset) |
| Fastboot | Google Pixel, OnePlus | High | Yes (with full clearing) |
Using computer utilities gives more control, but also increases responsibility. An error in selecting a file or disconnecting the cable during recording may lead to the need to resolder the memory chips.
Firmware via PC is “heavy artillery”. Use it only if OTA does not work, the phone is frozen or you want to change the region of the device.
Possible problems and ways to solve them
Even if you follow all the instructions, unforeseen situations may arise. One of the common problems is the "Not enough space" message even if you have cleared the memory. In this case, try clearing the cache of the system application "Downloader" or delete old folders with updates in hidden directories.
Another common error is “Unable to verify authenticity” or “Signature does not match.” This happens if you try to install custom firmware via stock Recovery or if the file was downloaded with errors. Solution: download the image again from the official source or unlock the bootloader.
If the phone starts to discharge quickly or slow down after the update, do not rush to panic. In the first 24-48 hours, the system performs background file indexing and database optimization. Let the device work in quiet mode for a couple of days, and performance should recover.
⚠️ Attention: Settings interfaces and menu item names may differ depending on the version of Android and the manufacturer's shell (MIUI, OneUI, ColorOS). Always check the latest manuals for your specific model.
What is Bootloop?
This is a condition where the phone constantly reboots before reaching the desktop. Often occurs after a failed update. The exit is to enter Recovery and perform Wipe Data/Factory Reset.
FAQ: Frequently asked questions about updating Android
Will my photos and contacts be erased during the update?
With a standard over-the-air (OTA) update, all data is saved. However, when flashing firmware via a computer (especially with a complete wipe of partitions) or when switching between major versions of Android (for example, from 12 to 13), a reset may be required on some devices. Always make a backup before you start!
Is it possible to update an old phone to the latest version of Android?
It depends on the manufacturer's policy. Typically, smartphones receive 2-3 major system updates and 4 years of security updates. If your phone is more than 3-4 years old, an official update to the new version of Android will most likely not arrive. In this case, you can consider installing custom firmware (LineageOS), but this requires skills.
What to do if the update is stuck at 50%?
Do not remove the battery if it is non-removable. Wait at least 30-60 minutes. If there is no progress, try a forced reboot (holding the power button for 10-15 seconds). If the phone does not turn on, you will have to reflash it through the computer in recovery mode.
Why do you need to update the operating system at all?
Updates bring not only new functions and emoticons. The main thing is security patches that close holes through which hackers can steal data. The processor operation is also optimized, battery life and compatibility with new versions of applications on Google Play are improved.
Is it possible to roll back to an older version of Android?
Officially - almost impossible. Manufacturers block the possibility of downgrading for security reasons. You can return the old version only by complex manual firmware via a PC using special tools and searching for old firmware images, which is not recommended for ordinary users.