Manually change the MIN number

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http://forum.xda-developers.com – Alright guys i did search on here, and google before posting this thread and haven't really found an answer. Anyways my dads S3 has been acting weird lately, he lost his IMEI and we restored that and everything was fine, well a few days ago he had to travel and put the phone into airplane mode on the plane, got off the plane and it was stuck in roaming. At that time he couldnt receive text messages, but now he can't send texts, receive them, make or receive calls, etc. Well come to find out his MIN (Mobile identification number) somehow got changed to a phone number that hes never used or reco (HowTos)