read this guide steps 1 and 2 will get you the info you need to start
http://forum.ppcgeeks.com/showthread.php?t=17667
after that
dail ##778#
you will come to screen to put in your MSL number.
After that you have 3 options, choose Edit
Now you have a screen with Display at top, now at bottom you should see View info, click, in the list you should see Data Parameters about 1/3 down list choose this. Now you should see REV A second on list is it disable or enable, if disable use bottom at right to change, now it will reboot