Originally Posted by Dubdub
I don't think you are totally correct, Boy Genius. If you have an unlocked GSM phone it will work, in theory, with any GSM carrier, such as Cingular or T-Mobile. It will not work on CDMA carriers such as Verizon and Sprint/Nextel. I don't think any US phone will work in Japan or China. I think GSM will work in Europe.
I say in theory because it is really up to the carrier to allow the device on their network. I have heard that Sprint will only allow their own branded phones to operate on their network. I do not think Cingular and T-Mo are of that same opionion, however.
Geez - read the first post.
"If it's Vodafone and it's GSM. Could people from the States buy it from Europe, unlock it, pop in the SIM card and install the software to make it work?".
The question was about a GSM based RIM.
Boy Genius is correct. If you can get it unlocked it will work on any GSM carrier.