I have a rooted Samsung Galaxy J1 Ace SM-J111F running the stock ROM in Android 5.1.1. I used [this XDA-Developers guide](https://forum.xda-developers.com/android/development/root-samsung-galaxy-j1-ace-sm-j111m-f-t3395520) to root it. It suddenly got bricked via FRP lock so I tried to unroot it...
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