I just got a BB Pearl 8120. I haven't signed up for any BB services yet or made any additions to my cell service, but I thought I could at least use the IM feature since I have used it on previous non-BB phones and IM is included in the service I pay for. I am not able to IM on this new phone because it says that service is not enabled for this handheld. I don't understand how I have the IM application on this phone and I have always been able to IM on other phones, but now I can't?