I don't personally use the service but I would guess that using AIM does use your prepaid balance whether or not you make calls.
Hi everyone I just got a new T-Mobile to go phone (Motorola v300) and it comes with 60 minutes of starter time. For some reason these minutes are being gradually used up even though I havn't made any calls yet. Does t-mobile charge minutes for signing on to AIM or checking account info on tzones? Also, where on the phone does the headset plug into? Thanks in advance.