I would not recommend T-Mobile under any circumstances.  Here is my experience.  In December my son died.  He had a blackberry 8700.  I had his phone service cut off because I didn't need two cell phones.  Now, in June when I am finally being able to crawl out from the grief and anguish I felt over the death of my only son, I am told by T-Mobile that, since I waited over 90 days, they cannot request the unlock code and that Blackberry will not give it out to customers.  I want to switch my existing service with Cingular (now AT&T) to my son's Blackberry.  I spent over two hours over the phone with them, and they proposed that I purchase a new phone, but the card in the Blackberry, and in 90 days, they could unlock my Blackberry.  After I placed the order and after I had called the tech people to verify that information and found that it was incorrect, I called back to cancel the order (less than 30 minutes).  I was told that I could not cancel the order, that it had been processed.  One thing I have found is that companies do not apparently make plans for a single person dying.  I was unable to disconnect his electricity because I was not he or his wife (he had none), and now I can't get his phone unlocked because I waited more than 90 days.  Suggestions?