I am going to post this- it might help someone else. I have a blackberry pearl with t-mobile. I have been told by T-mobile sales rep and their telephone reps that you can call and request the unlock code for your phone. This allows you to put in a code that will allow you to take out your sim card and put in a sim card that you can buy in Europe that has low rates and is prepaid. In Europe- most companies allow incoming call free- charging the calling rate to the caller- so you are only paying for the phone call on one end- vs in the US where they have to pay to call you and you have to use your minutes to answer the call. (I never got that double thing) Anyways, the rates are supposed to be similar to calling card rates. It makes it so you don't have to have an internation plan with your carrier and you can purchase minutes as needed through companies. I used to have a link, but I am at work and don't have access to it. BUT, this will only work if your company will give you the unlock code. I think you have to have been with them for a certain length of time and perhaps be locked into a contract- so they know they will get their money, even if you aren't calling on their network. Without the unlock code, the sim cards for Europe won't work.
Celeste,
It's not quite as simple as that. You actually need a GSM based phone. There are three technologies in work in the US (well 4, but 3 for most): CDMA, GSM and iDEN. If your phone doesn't have a GSM base to it, the swap a SIM won't work. What you are looking for is the SIM unlock code which is a 6-digit code (at least in our phones) which is NOT the same as your PIN code (if you have one).
So... it all depends on your carrier. Sprint is CDMA. The former Nextel (now Sprint) is iDEN. The rest of the carriers vary. Some of the newer phones have multiple technologies. They would be referred to as dual-band or tri-band phones.
Base stations are very expensive. This is why each carrier usually has just one technology.
Uh oh. I think I just got my engineer hat on. Sorry guys!
Anyways - if anyone is thinking of doing this - make sure you call your carrier first.
Or you could just buy a cheap throw-away pre-paid phone (like Boost in the US). If you buy a $100 SIM, the throw-away phone is usually free anyways.
Sweet Sue