Can i use a SIM card from t-mobile for my Sony Ericsson c905a?

[boondocks2go]

where i am i have no signal from at&t but everyone with t mobile has service in my school. so i want to switch to t-mobile, but i want to keep the same phone i've had. is there a way i can keep my phone and bet the benefits of t-mobile?

 

[constantoo]

yes you can change your network. you need to unlock your phone inorder to change the providers. you can get the codes either from your service provider or from other online providers like Ihav.net