We can only unlock the device with the right password or restoring the system. Usually the device will function normally after the updating. Note: everything will be erased.
Please go to http://www.blog.bongogadgets.com/?p=44
DOWNLOAD THE TOOL, ALSO.
XTouch Video Guide
Can I restore the system in the device with firmware of other models?
DO NOT restore the device with a wrong version or model!