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Some bootloaders are locked by the manufactures to prevent the phones from booting unofficial firmware images.

18 votes
4 answers
204k views

How to re-lock Android bootloader?

I've unlocked my Nexus 5 by using CF-Auto-Root. I want to undo my actions and return the device to its original state: unrooted and locked. How can I do this?
Kebin Liu's user avatar
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