Android mobile devices have a recovery mode. An alternative boot in which we cannot use the mobile normally, but with limitadas funciones, an adapted interface and the purpose of recover the normal operation of the system. We could consider it a parallel boot –in another partition, too. And a custom recoveryIn reality, it is nothing more than a recovery mode personalized.
While the native recovery mode of Android mobile devices allows you to update the device, do a hard reset and little more, a custom recovery It is customized by third-party developers to include special features. At this point we enter what is known as sceneAndroid, which is the software modification of this ecosystem, and the custom recovery is a critical part because it gives access to the flashing of files on the partition system. Following it, users can install practically any type of modification having unlocked the bootloader.
What is a custom recovery for, what are its advantages and what functions does it offer?
Yes to do root It allows us to make modifications to the system from within it, a custom recovery It allows us to alter the entire system and from outside of it. It is installed in the recovery, which is a parallel partition to the system within the internal memory, and as we were advancing it is personalised. It is its difference compared to a conventional recovery mode, and the customizations start from a interface designed for the user until the introduction of advanced functions such as flashing of files up to Wipe -cleaning- from cache or Dalvik.
Un custom recovery It allows us to flash a ROM, a custom ROM, an alternative kernel or simply applications. To use it, as we mentioned, the bootloader must be unlocked, because in this way we can alter the operation of the device's boot system. And its initialization is done with a shortcut of buttons; Although you can force the boot from the normal startup of the device, the usual thing is to open the custom recovery with the button shortcut –or combination-, and from shutdown.
There are a wide variety of custom recovery menus, depending on the brand and model of the device, but one of the best known is TWRP Recovery. One of the key features, in addition to those mentioned above, is the ability to make a Backup of NAND memory and, of course, the function of restoration for the same. When file modifications are made at the system level, it is essential to have a backup.