Why isn't my tmobile iphone receiving calls?

Okay so recently in the past month or so my phone hasn't been receiving some of the calls it gets! My boyfriend calls me everyday and he says it will go straight to voicemail or keep on ringing or ring and just go beep beep beep! I did jailbreak it recently too! I think it was doing it just a little even before i jailbroke it but now its really bad! I'm getting a new phone soon but i want to know if its the phone or tmobile!

If it was after the jailbreak, it was NOT the jailbreak. It was either the phone or something you installed from cydia. Try reseting your iphone. Any questions? Ask!

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