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Is it possible to lock my phone without losing the system data it has? I had previously unlocked my Nexus 6p to get root access, and have since despised the big yellow warning sign reminding me that my device is unlocked every time I restart my phone. I have downloaded over a hundred apps as well as movies, music, and other files that I don't want to lose, so factory resetting is not an option. I am running Android 7.1.1 Nougat with a TWRP custom recovery.

  • You could just do a backup and restore it afterward. – Matthew Read Dec 27 '16 at 0:52
  • I'd rather keep my data completely if it is so possible. – Devin Ersoy Dec 27 '16 at 0:55
  • "big yellow warning" you could just flash another bootlogo... – xangua Dec 27 '16 at 2:08
  • It would be great if that were possible. I don't believe it removes the yellow icon though. – Devin Ersoy Jan 6 '17 at 20:38
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On Nexus 6P the bootloader relocking method is contains the Factory Reset, there is nothing to do.

If you are trying to relock your device you should see a screen like this: image.

If you want to keep your files and data you should make a backup and when your device bootloader agian locked you restore it.

This is a normal behaviour but for example on OP2 there is a method to keep your data in save during the bootload relocking procedure.

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    I believe that the OP2 method is to unlock. Will it work the same for locking? – Devin Ersoy Dec 27 '16 at 17:08
  • In the linked article there is a paragraph named: "UNLOCK/LOCK BOOTLOADER WITHOUT WIPING DATA​" so I guess it's a bidirectional method. – Bálint Babics Dec 27 '16 at 20:01

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