How to put your LG Optimus Black (White version) into Recovery Mode
All Android phones come with built-in recovery mode that is separate from the original operating system.
The recovery mode is used to access different features of the phone without accessing the phone’s OS.
The main function of the recovery mode is to fix the phone while staying away from the faulty OS of the phone.
1. For a start take your phone and hold down your power button to shut it down.
2. Second thing we have to do press and hold the Volume down key + Power key with your hand.
3. When you will see LG logo on your screen you can release those buttons.
4. Now there should be a recovery mode menu on your screen.
5. And this is it! You have reached your destination.
What does it for? In the past, a phone is more of a device used to make calls or text. However, it's much more than that.
Most Android devices are now defaulted with a fairly simple Recovery mode with features like Reboot System Now, Apply Update from ADB, Apply Update from External Storage, Wipe Data/Factory Reset, Wipe Cache Partition, Apply Update from Cache.
Just like a lot of other things with Android, even the Recovery Mode can be customized to do more things.