I have an old phone on which I installed a new custom ROM, but the WiFi does not work because
/system/etc/wifi is missing. I just have to move the vendor's folder from
system/vendor/etc/wifi with command
adb shell. However, Android won't let me use it as it says that
/system is "read-only".
So I tried with
adb root, I was root but did not work. I then tried with
adb shell su -c "chmod -R 755 /system", but it still said that it was a read-only directory. Finally, I rooted my phone with Magisk, but still did not work, I got the message "adb cannot run as root in production builds" when I typed
adb root. So I am really at a loss.
Anyone went through this also? Thanks.