What is custom recovery ?
Whenever you buy and Android device, it comes with the default inbuilt recovery. This recovery is called Stock recovery. The main function of the recovery is to boot and reset the android device when you can’t open boot menu or the device is hanged. In most of the device default stock recovery can be simultaneously. Custom recovery is also something similar but it provides some extra features as compared to stock recovery. You can reset the device, update and backup your device by flashing custom recovery. Simply install custom recovery and get access to many features. Moreover you can also install a custom ROM. By installing a custom ROM you can change the UI and many other features of your android smart phone.
Installing custom recovery