Samsung galaxy s5 sm-g901f v5.0.2 Move an app from user to system

Question

I have a samsung galaxy s5 sm-g901f android: 5.0.2 (I live in france) and I would like to move an user app to a system app. I already dowload system app mover and do the read and write mount but it still doesn't word. I also root my device. And I try to move de file manually but the app does not work anymore. What can I do? Thank you in advance.

— user180066 | Sources

Answer

Simple steps, but you might have forgotten to do the last step.

Uninstall the user app as usual, but keep its APK somewhere. Rebooting after this is recommended.

Depending on whether it needs system privilege, put the APK into either /system/app or /system/priv-app

Set permissions for APK to rw-r--r-- (0644) and reboot.

Rather curious about what you're trying to achieve by moving the app to system - is it necessary?

— Andy Yan | Sources

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