i am on the t-mobile network and every time someone calls me the phone rings for a few seconds the hangs up no matter who calls. i tried to look for any settings to turn it off and looked on Google for a answer but found nothing, anyone have any ideas what's going on? i recently uninstalled a virus program called symantec mobile security thinking that was the problem but it still persists. do you think it may have something do to with the firmware? i can't update because i already have the latest firmware for my t-mobile locked phone. maybe it it could be the 3G/GSM network option i turned the 3G network off and put on GSM only maybe it's that?