In Android, recovery refers to the dedicated partition where the recovery console is present. The two main functions of recovery are deleting all user data and installing updates. For instance, when you factory-reset your phone, recovery boots up and deletes all the data. Similarly, when updates are to be installed on the phone, it is done in recovery mode.

There are many enthusiastic Android users who install custom ROM through a modified recovery module. This modified recovery module is mainly used to make the process of installing custom ROM easy. Recovery mode can be accessed in different ways, depending on the manufacturer of the device; information on which method is right for which manufacturer's devices is easily available on the internet. Usually, this is done by holding different keys together, such as the Volume button and Power button. Once in recovery mode, connect the device to the workstation and try to access the adb connection. If the device has a recovery mode that is not modified, you may not be able to access the adb connection. Modified recovery versions of the device present the user with different options as shown in the following screenshot:

Next, we will see how to flash the recovery partition.