So, you will need :
- Installed drivers for the phone. (You can find them here)
- AcerDownloadTools (also known as ADT) to flash the firmware.
- Leaked firmware
Extract both ADT and firmware.
Launch ADT with acer_DownloadTool.exe.
Reboot the phone in bootloader by removing batery, insert it again and then plug your phone with USB cable while pressing Vol+.
You should see "boot mode: fastboot".
Select "Mobile Phone" tab, select the folder where you extract the firmware and tick checkboxes as shown below :
Click "Start" button and wait ~5min until the phone reboot by itself.
Once booted, we will know unlock bootloader. For that, reboot again in bootloader, then launch command :
fastboot -i 0x0502 oem unlock
If you don't know how to do that, you can download this automated script : http://vache-android...auto_unlock.zip. Unzip the "auto_unlock" folder then launch "unlock_CM.bat" when booted in bootloader.
Enjoy you're updated/unlocked CloudMobile. You can now safely flash the recovery.