crwdns2934241:0crwdne2934241:0 bac

crwdns2934249:0crwdne2934249:0:

have you tried to restore your phone in iTunes?

no guarantee this will fix your particular problem, but worth a try at least as first step. my brother's iPhone 3G suddenly started getting bad noise/interference during calls, and in his case a restore seemed to fix the problem. 

crwdns2915684:0crwdne2915684:0:

open