The best and only perfect solution to this problem is to write factory flash via flasher over it and you will get your OG IMEI Back
This is tested solution by me and many others. Try to search on the back (IMEI sicker) for the proper version.
Dont try any other.
Try here
http://support.moulnisky.com/index.p...A%20Serie/A72/
WBR
Jyoti