IPhone 3G static interference during call tmobile?

DudeBro521

New member
when i call people on my iphone 3g, it always has this annoying interference sound as if i were to put my phone next to a speaker when sending a message but the thing is, it is coming from the speaker at the iphone (when you put your ear) any idea how to fix this? im running 4.1 OS unlocked/jailbroken w/ T-Mobile. Ive had an iphone before this and this never happened. This only happens during phone calls! I have tested this through a recording app and the play back was fine.
 
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