IPhone 4 sim locked, same carrier?
I have two iPhones here, an iPhone 4 7.0.2 and an iPhone 4S 6.1.3
both are not jailbroken and recently i switched the contents of the phone and switched sim cards as well. Both sim cards are from the same carrier and both are being payed monthly (post-paid)
when I switched sims, the sim i used on my 4s is locked on my iphone 4, but the sim on my iphone 4 is okay with the 4S. Again, they are of the same carrier.
How do I fix this without jailbreaking?