It's always more secure to have it in case of "emergency"...
Backup custom recovery
What you need to know before flashing custom recovery:
After flashing custom recovery you can always revert to your stock recovery. This procedure will be described later.
Your bootloader needs to be "UNLOCKED". "LOCKED" or "RELOCKED" bootloaders can't flash custom recovery.
This operation will cause your bootloader to show "TAMPERED" text below "UNLOCKED".
For safety reasons, first what you should do is nandroid backup inside recovery. You might need it during "going back to stock" procedure.
1. Download this mini-sdk package and extract it to c:\mini-sdk
2. Download custom recovery of your choice and rename it to recovery.img
3. Move recovery.img to c:\mini-sdk location
4. Connect your device to the PC
5. Boot your device in fastboot mode (like you did during unlocking bootloader - power off the device and turn it on using power + vol down buttons and select "FASTBOOT")
6. Open up command prompt ( Start > Run > type cmd and hit enter ). The window that appears is called Command Prompt. <click here to see the image>
7. Navigate to where you unzipped "mini-sdk" package (type in Command Prompt: cd c:\mini-sdk). Note: make sure the path is not c:\mini-sdk\mini-sdk
8. In the Command Prompt type following command: fastboot boot recovery.img (this command might not with newer hboots)
Command above will not permantently flash custom recovery, but it will just boot it. Why? Because that way we can backup your original, stock recovery image before we replace it with custom one.
9. Perform a nandroid backup.
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