won't make calls after motherboard replacement

won't make calls after motherboard replacement

alpha402

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Greetings,

I checked some of the forums and couldn't find anything that answered my question so I am going to ask it here. If there is a forum that answers my question just include the link and call me a dumb ass.

I recently cracked the screen on my sprint iPhone 4s, and basically demolished the phone. I decided to try and swap the motherboard from my broken 4s with my sisters less broken AT&T 4s. I was able to make the swap and the phone powered up and is working fine except that it will not make or receive calls, and will not connect to the internet unless through wifi (basically an itouch that will send text through wifi). It is showing that I have service but it moves from saying "sprint" to saying "extended".

I am wondering if anyone might know what is going on or might have any ideas on how to fix it.

Any insight would be greatly appreciated.
 

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