Can you use a t-mobile phone with cingular service?

[dianator]

i found a t-mobile phone and it has a sim card in it..and so does cingular???

how can i make it work with my cingular line??

[RichardC]

You have to get a phone that is unlocked otherwise you can't use a cingular sim card.

[tasteyy]

i found a t-mobile phone and it has a sim card in it..and so does cingular???
how can i make it work with my cingular line??

You need to unlock the T-mobile phone from tmobile network lock.Then use with other GSM Network Sim card...You can get the unlock code from Simpleunlocking.com and get free unlocking instructions at Mobileunlockguide.com unlocking it easily,then use any GSM Network Sim card in the Phone.