Recovery, in Android, refers to the bootable partition, in which the recovery console is installed.
It contains tools to help repair your installations as well as install official OS updates by using a combination of key presses or instructions from a command line sometimes.
Android is open, meaning the recovery source code is available, so that building a customized ROM is relatively easy.
1. First thing you will have to do in order to put your LG Univa E510 into Recovery Mode is switching it off.
2. Now you have to press and hold combination of power button with volume down button.
3. When you will see LG logo on the screen you can let go of the buttons.
4. And now your phone should boot into Recovery mode, congratulations!
5. To navigate in this menu you will have to use volume buttons and Power button to select option you want.
Recovery is included on a separate partition from the main Android OS on all Android devices.
You can boot directly into recovery mode and use it to factory reset the device, delete the cache partition, or apply software updates.
It can help you fix your device.