said by floydb1982:I use My Huawei Prism II with the T-Mobile network. In The network settings my phone is also able to see the AT&T 2G and 3G network. Does that mean my phone is unlocked???0.
Nope. Even locked phones can roam, you are seeing available networks.
The surefire way to see if it is SIM locked is to pop in an att or other non t-mobile based gsm sim and see if it complains.