Is there any way to unlock an AT&T Blackberry to run on t-mobile?

[Athena]

I want to put my t-mobile SIM card that I've had in my t-mobile Blackberry Curve 8320 & put the SIM card into an AT&T Blackberry Curve 8900 for free? Is this possible?

 

[vamsii]

After unlocking your blackberry you can use it with any network provider. I found an unlocking service for your mobile at Ihav.net .You can use this and unlock your mobile easily.

 

[qwertysy]

Hi, Athena
You can get the unlock code for your Blackberry curve 8320 phone from UnBBLock.com and unlock your phone from Network lock easily.