I have recently bought an iPhone 4 and it has been working fine by now but then I don’t know what happened to it suddenly and now when I am receiving a call then the person who has called me is not able to hear me but then I am able to hear him without any problem and this happens often because sometimes when I receive calls then I don’t have any such problem. The other problem is that when I receive any call or I call anybody then I hear crackling noise from the mic but then I don’t have any problem when I am using the speaker phone. Is there anyone who has faced the same and has an idea about it and can help me out as well??
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