I'm considering switching carriers to t-mobile and getting a bb 7105 to liberate myself from my desktop. My question is can I buy another cheap small phone when I purchase the 7105 and switch out sim cards when I am cycling or whatever and don't want to carry the larger bb device? I'd like to be able to use the same number. Has anyone done this or have any recommendations on how best to deal with this? I've searched all over but not had any luck. Thanks.

Yes, you can do that. We have people who switch the SIM cards out on weekends when they don't want to carry their BB.

wow that was fast. thanks. now to just decide if I want to play the rumor mill and hold out for a 7130. thanks again.

Yes I currently do that with My Razor. Works great.