Confirm your device is specifically the X Mobile X2. Using firmware for a different model will cause a hard brick.
Restoring the original firmware can make the device feel brand new. Preparation and Safety Checklist x mobile x2 flash file best install
Persistent "App has stopped" messages or UI crashes. Confirm your device is specifically the X Mobile X2
Ensure your X Mobile X2 has at least 50% charge. A power failure during flashing can be fatal for the hardware. x mobile x2 flash file best install