Acer Z320 and Z330 android 5.1 Lolipop, use the same file, doesn’t matter
Step 1: Required Files ->
1- Download & install Adb and Fastboot from this thread : ADB and Fastboot
Step 2: Prepare Your device ->
1- Enable USB debugging on the device (How To)
2- Enable “OEM unlock” in the Developer options settings on the device.
3- Shutdown your device
4- Press Volume Up (Volume +) don’t release it and press power key untill Acer logo appear and release power key only (keep your finger on volume up) until you enter to recovery mode
5- On stock recovery, just choose Fastboot mode
6- Connect the device to the computer through USB.
7- Now launch CMD on adb folder (press shift on keyboard and right click on your adb folder and choose “Open Command Window Here”.
8- Verify your PC sees the device by typing :
***** If you don’t see your device serial number, and instead see “<waiting for device>”, fastboot is not configured properly on your machine. *****
Step 3: Execute this commands
fastboot oem unlock
2- Verify if your bootloader unlocked
fastboot oem device-info
***** If all ok show you “Device unlocked: true” ************
3- Reboot to system
Install TWRP Recovery
Step 1: Bootloader Unlocked Required !! If not follow my instructions on top
Step 2: Download TWRP.zip from this link (Download) and extract recovery.img and copy it to your adb folder.
Step 3: Enter your device to Fastboot Mode, Connect it to the computer through USB and launch CMD prompt from your adb folder.
Step 4: Type this command
fastboot flash recovery recovery.img
And DONE ! You have now TWRP !!
Credits : TWRP compiled from the original source by “Jemmini”
Step 1: Bootloader Unlocked & TWRP Recovery Required !! Please Follow My Instructions on top (B & C instructions)
Step 2: Download latest Supersu from this thread (SuperSU v2.79) Choose “TWRP / FlashFire installable ZIP” one.
Step 3: Copy SuperSU zip file to your internal or external storage on your device.
Step 4: Reboot to TWRP recovery :
Press Volume Up (Volume +) don’t release it and press power key untill Acer logo appear and release power key only (keep your finger on volume up) until you enter to recovery mode.
Step 5: On TWRP enter to INSTALL and Choose the superSU zip file and install it.
Step 6: Reboot.