How to install stock image (P852A12V1.2.0B12_RM_data.zip) to restore back to stock?

doannguyen97

New member
Nov 2, 2010
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This may sound dumb but I have noverity and twrp already installed and cannot get it back to stock by installing P852A12V1.2.0B12_RM_data.zip. Usually I can get this done in the recovery and update the zip file but it doesn't show me an option anymore. Is this possible with TWRP?
Currently on LOS 14.1 since that is the only thing I can load up (sure other roms work too but more interested on stock for Wi-Fi calling). I have tried tdm B14 boot stack and stocksystem files but I get hung on ZTE startup.

Anyone have any insights?

Update:
Got it working. Crucial step was to make system read-only in TWRP.
 
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