The operating shell Android conquered a huge segment of the market primarily due to its functionality and customization capabilities. However, sooner or later the question arises – how to change the firmware to Android, it can arise in cases where the stock is no longer satisfied, or a new version has been released with updates that make the platform more stable. In the presented article, the issue of updating the shell will be discussed in detail.
Replacement methods
Let's look at ways to replace the firmware.
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Update via device settings
Let's consider the first way to update firmware on Android.
For the duration of the process, it is recommended to connect the device to the charger so that the update is complete and completed correctly.
- First you need to go to the 'System' menu, go down and click on 'About phone'.
- There will be a 'System Update' item.
- An internet connection is required, otherwise a notification will appear informing you that there is no connection.
- After connecting to the Internet, a scan will start, which will show if it is possible to update something.
- If the latest version is already installed, a message will appear with a message about it.
- Otherwise, the phone will display a file that you can download and install.
- Before updating the Android firmware, you need to make a backup copy of all contacts and SMS; some folders can be transferred to a memory card.
- After downloading, the installation will begin.
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Rollback to the previous version of Android: Video
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Upgrading with superuser rights
The first method is considered official, when using it, the device is not removed from the warranty, however, such an update is not available from all manufacturers. Let's consider how the firmware is changed on Android in the second way.
- First of all, you need to get superuser rights in the shell (or Root).
- Next, you need to download and install the Rom Manager program. You can find it by following the link.
- The next step is to search for and install an archive with firmware on the memory card. There are a huge number of the latter, it is worth choosing, first of all, based on your own needs.
- After installing the application, you need to launch it. There will be an item 'Install ROMs cards': you need to activate it.
- Then you need to select the archive with the firmware and put a tick in front of the 'Save current ROM' item. If something goes wrong, this will allow you to roll back the Android firmware to its original state.
- It will reboot and start installation.
The utility also allows you to search for firmware for specific gadgets, you can do this in the same main menu. If it was not possible to activate the 'Install Rom from the card' button, then you need to download the ClockWorkModRecovery. 
After that, it will be possible to load the engineering menu and install the shell from the archive.
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How to get ROOT rights: Video
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Rollback to a previous version
Reinstalling firmware on Android is relatively easy, but during this procedure, unpleasant situations can occur when the platform stops working correctly. In such cases, rolling back to a previous version helps. To do this, before any manipulations, you need to make a backup copy of the current shell and save it, so that you can install it again later if necessary. In each individual device, the process goes differently, in some cases a simple reset to factory settings helps. To do this, go to the menu 'Restore and reset' and 'Reset settings'. 
After activating the item 'Reset phone settings', the procedure will start and everything will be restored to the factory state.
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Replacing the firmware with Android: Video
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How to restore firmware on Android: Video