|
01/11/2005, 08:56 AM
#992
 Originally Posted by daygo718
What if you buy a Cingular branded phone and use a T-mobile sim card...will it work on T-mo or do you need to upgrade the sim to 64k? Does T-mo even have a 64k sim to upgrade to? It would suck if those of us on T-mo would have to wait for an unbranded version to come out because Cingular 650's require this upgrade.
In order to use a Cingular branded phone on T-Mo, the phone must be unlocked. If the phone is unlocked and you put any T-Mo SIM in it, it will work.
I had a SIM in my Treo 270 that was so old that it was delaminating. I was using it with T-Mo but I had gotten it from a company that T-Mo had acquired. One day I got a message from T-Mo offering to replace my SIM. I accepted. They sent me a new SIM along with a little machine to copy the personalization from my old SIM and initialize the new one with the same information. I assume that the new one is 64K and that the old one was 32K.
When I got my unlocked Treo 600 GSM, it had Cingular software in it. I put my T-Mo SIM in it, both voice and data worked immediately. Yesterday I put a Cingular SIM in and both voice and data worked immediately.
Welcome to the wonderful world of GSM.
|
|
|