None of this is original except the combination of the two methods but it worked for me. Always be careful!
Go to this post: http://www.modaco.co...lock-your-g300/ and follow the instructions down to step 5.
Download and install QPST (the link is on the xda thread posted below).
Reboot your phone, connect to your PC with debugging enabled
Then go to this post: http://forum.xda-dev...d.php?t=1802024 and follow from step 9.
Then, from the above ackowladged post by margityu, make sure you do the following, quote:
12. Go to engineering menu again.
13. Go to ProjectMenu/Background setting/Usb ports setting and select Normal mode
14. Back to Background setting and go to OTP NV filter switch and click Confirm
15. Back to Background setting and go to Qualcomm background open setting and select background close.
16. Restart Phone.
It just puts your phone back to default.
When rebooted try *#06# and you should have your original IMEI. If not report back here.
QPST is a dangerous and powerful tool, so read everything first and follow the instructions exactly. You do this at your own risk.
Acknowladgements to http://www.modaco.co...81433-margityu/ and http://forum.xda-dev....php?u=3057569. Thanks.
Edited by blatny93, 23 November 2012 - 07:53 PM.