tmobile usually locks their phones, so you would have to call and get it unlocked. Cingular doesn't usually lock their phones though, so the tmobile card should work in a cingular phone.
you cant. tmobile sim cards only work in phones with tmobile service providers. however you COULD unlock the phone.
yes you can, all u have to do is call the company and tell them to unlock the phone then it sould work
it depends. if you have a cingular or tmobile phone they can usually be easily swapped with one another.
If you are trying to use the T-Mobile phone with your Cingular SIM, and maintain your Cingular service, you will have to call T-Mobile to get a Subsidy Unlock code, and unlock the phone to be used with Cingular's service.
On GSM Tracfones, if the phone has been unlocked a Cingular SIM card can be used. If the phone is a CDMA phone, no SIM cards can be used.
A used LG CU500 Cingular wireless phone can be found for around thirty-five dollars. A Nokia 6010 wireless phone for Cingular can be found for about forty-five dollars.
Palm Treo 680 - Cingular Sidekick ID - Tmobile Blackberry 7100G - Unlockable En-V - Verizon
How do i get a tmobile account on a at&t phone?
No; the networks used by Cingular (now AT&T) and Verizon Wireless are incompatible.
Its possible if you rewire it correctly
A Cingular cellphone is a phone that is tailored or made specifically for the Cingular cellphone network. Cingular at the time had a GSM network that used a specific cellphone band to make and receive calls.