New answers tagged att
I just wrestled with this on my galaxy note 9.0. In /system/app there is a file called (for me) FWUpgrade.apk Even though I am rooted it refused to rename or remove it in a file explorer... I tried a few. I eventually just used terminal to chmod 666 it after su-ing to get root. Then I removed it no prob. So, at the term prompt: su cd /system/app chmod 666 ...
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