On some t-mobile phones you can use your cingular/at&t sims card,but on some phones after putting a t-mobile sims card in a cingular phone may cause the phone to lock up.....BUT u can unlock your phone by calling your network from another phone or logging on to your account on the internet(I PERFER CALLING YOUR NETWORK).You can also unlock it but putting another cingular sims card back in a cingluar phone then your phone should work correctly if still locked call your service provider but your t-mobile phone shouldn't get locked if u put a cingular sims card in it your phone should work perfectly fine but if not call u service provider.
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.
Yes if your Razr is from Cingular or unlocked. You can not use a T-Mobile Razor with Cingular prepaid sim card or Globaltravellersim prepaid international sim card unless your phone is unlocked.
yes you can, all u have to do is call the company and tell them to unlock the phone then it sould work
you cant. tmobile sim cards only work in phones with tmobile service providers. however you COULD unlock the phone.
I belive so, I used to have T Mobile and bought a prepaid phone and activated it with a monthly even more plus plan.
You usually need to get prepaid phones unlocked before they will work with a SIM from a different network.
Yes, in the case of TMobile I bought a prepaid tmobile phone and have been able to use it for my postpaid tmobile account. The sim card was smaller so I had to contact them to transfer my phone number. I know that Virgin phones can only be used with their carrier but I'm not sure what other carriers rules are.
It depends on what company you bought the phone from and if your phone has a replaceable sim card.
Advantages of having a Cingular wireless prepaid phone card include free included voice mail, call waiting and three way calling and you are not obligated by contracts because you pay for the minutes in advance by purchasing the pre-paid cards. You can purchase these cards from websites such as CallingCardPlus.
Virgin Mobile uses CDMA, so their phones do not take SIM cards.
Yes. if it is a tmobile sim card and a tmobile phone then this will definitely work. you will also be able to carry on with the same price plan and number you used before. If you currently have a Tmobile phone on a contract plan that is complete you can also just change your plan to a pre paid plan and keep on using the phone that you have. UPDATE: As of April 2012, TMobile prepaid phones may only connect to T Mobile towers, limiting your signal (since they also use ATT towers) and giving you varied signal strength depending on your location. So, it's best to unlock any prepaid phone. Ask T Mobile to send you the unlock code or pay someone to unlock your phone.