Lately my speaker phone has stopped working. I can hear the other party, but my voice they cannot hear. I cleaned the microphone area and the earphone connection as well with same results. Could this be a problem with the micro-usb board? I tried using compressed air to clean the earphone jack and it worked for about 2 calls then back to nothing on their end. Any Ideas? I'm almost out of my 2 year contract (3 more months) and not sure what phone I'll like as much for the next one.