Free download Stock Firmware ROM (flash file) for XBO U4 . Download the firmware with unlimited bandwidth links. The firmware is fully shared and free of charge.
The Flash File will help you upgrade, downgrade or reinstall the Stock Firmware (OS) to bring your mobile device to the factory state. Besides, the firmware file can also help you fix software errors, IMEI errors, application stopping errors, source errors, etc.
[*] Take a Backup: Please backup your XBO U4 device before installing the firmware.