can I use a Motorola rzr with a sim card from T-Mobile?

I have a Motorola RAZR from Cingular and I have a Samsung phone with a Sim card from T-Mobile. Can I have a code to be able to use.

HI no you can't use Motorola RAZR with t-mobile sim until you unlock it from cingular network ...You can easily unlock your phone using sites like Onlinegsmunlock.com here they are rendering unlock code for all mobile models at reliable cost ..After unlocking your phone you can freely use it with any GSM sim in any countries....