absolutly if it is the same carrier
Answer
Yes, some new phones may warn you that you're not using the original sim card, but disregard that and you're ok. there's no reason why not.
Yes: As long as you have another Cingular cellular phone, that uses the GSM technology, there is no problem* (the Apple iPhone is an exception to the rule).
Your SIM card is your "phone", the single object that provides celluar service service to you. The physical phone is simply a device. Without the SIM card, it's useless.
Cingular, now the New AT&T, uses the most common network in the world, called GSM (Global System for Mobile Communications), which is used in approximately 70% of the world. Therefore, essentially, you can put a Cingular SIM card into any GSM phone.*
* There are some stipulations that can alter this answer.
No you cannot, but you can use it in an UNLOCKED T-Mobile phone. Cingular and T-Mobile work off the same network which is GSM and this allows you to switch phones. I have T-mobile but the phone I am using right now is an unlocked cingulart phone. Nextel/Sprint and Verizon work off of the CDMA network and this is why you cannot use it.
When you have a sim card most times you just pop out your sim card and put in any other phone. So I would say yes you can as long as it's not CDMA ( no sim card ) you will be fine.
No, you cannot. T-Mobile SIM cards only with T-Mobile phones. The same goes for an AT&T or Nextel SIM card, they only work for AT&T or Nextel phones, respectively.
Yes, but make sure it's a at&t pay as you go phone. I did it when my good phone died.
Yes you can, but when you put it in, make sure that the silver squares on the back dont get scratched on the conector or it might explode. Don't learn the hard way....
most likely, expessially if its with the same company as your phone is. For example if you are a verison try to place your sim card with another verison phone.
It will work as your existing phone.
Well, the sim card works just like any other sim card in a CINGULAR phone, but if you have the unlock codes to your other phone, I'm sure it will work.
i have a pcs phone and i have an old cingular phone i really liked it has a sim card pcs does not can it be done
no
Technically speaking, a Cingular phone can be used with T-Mobile, as you only need to switch the SIM card. However, the phone may be locked to Cingular, in which you need to unlock it to be used with another GSM network.
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, as long as the i wireless sim card fits!
i would believe you can...
Sorry, you can't. Hopefully someone will invent that sooner or later!
Manually
non cingular sim card
You can program your son's Cingular Razor Phone to be used for your AT&T account by switching out the SIM Card with a more recent one from AT&T. This way you don't have to buy a new phone.
non cingular sim card