This is the scenario that i have encountered during rooting my htc one XL for fun. But i have encountered a problem of SuperSU binary "installation failed" when trying to update the binary.
Here i am going to share the solution that have been tried out accidentically.
Device : HTC One XL ( i think other device may also counter this problem too when they trying to root with the ZIp version SuperSU apk.
Device's bootloader is unlocked (HTC required, i dont think samsung need this step)
recovery mode Clockworkmod is installed (i think all devices need this mod in order to install apk in the sd_card)
SuperSU apk is installed in recovery mode by install app in the sd_card
The superSU is installed successfully in the phone, you can see the app located in the home screen.
When you try to click in the app, it prompt it requires to update some binary files of the phone. however it will just return "Installation Failed".
Your root access is not stable.
You might contain root access by using root browser (on google play)
But you couldn't "su" in the linux terminal emulator (on google play)
Also you couldn't "su" by using android shell in the android sdk tools's .adb shell
Below is the steps i performed and it is worked.
- Update the latest version SuperSU in the google play
- Afterwards, it will prompt the binary update screen again
- Choose the Txxx/CWB instead of Normal
- My device cannot automatically boot up the recovery mode, thus i manually started the recovery mode
- binary will be updated when you go in recovery mode
Actually I am not success in point 5 (binary will be updated when you go in recovery mode).
It means that the binary doesn't update when SuperSU is still the latest version (updated on google store).
and if you have also encountered this circumstance. reboot in the phone again, in the latest version of SuperSU, selected update binary by Txxx/CWB, and then uninstall the latest version of SuperSU by normal apps uninstallation
(you can never able to uninstall the old version SuperSU in the phone normally because its installed in the recovery mode).
Now you can boot into the Recovery mode, it will update the binary automatically, And you can grant the actual root access for your phone after reboot the phone again.