Hi, Kind of a random question, but is there a universal way to tell if a cellphone has been unlocked (e.g. for GSM phones)? For instance, if I call T-Mobile up and whine them out of an unlock code for my RAZR, I guess I'll know it's unlocked because I'll get a confirmation when I use the code. If there were another phone, and for whatever reason, one were not sure if it was unlocked or not, is there a generic test, short of going and getting someone's SIM who is not on that service provider (e.g. conniving a friend to let me put their AT&T SIM in my T-Mobile RAZR) and trying to see if the phone will provision?