you have to go online to buy a unlock code for the phone, once you have the unlock code you can put the sim card in and it will ask you for the code.
if not you can buy a sim card holder that can convert your tmobile sim card into the at&t phone so you have use of the at&t phone, but with tmobile!
yes, you can. as long as your sim card will fit in the sim card slot.
oyu can use any unlocked att phone with a sim card port
You can put any SIM card in an unlocked cell phone.
Yes, but it has to be a phone that can accept the sim card, and it must be unlocked by the previous company. ex. if you have a tmobile phone you want to use, call tmobile and have it unlocked, then put your att sim in. It is not recommended though due to data services will generally not work. p.s. Iphones can not be unlocked by anyone.
If you mean putting an at&t sim card in a t-mobile phone, no. Sim cards only work in phones that are the same brand.
No, I've tried. You have to insert a special code. (3 tries and the phone locks down) You have to get another att phone.
No most phone companies do not allow any SIM card to go into all phones. The only exception I have found is the SIM cards for ATT phones and TMobile phones.
Yes as long as the phone is att and has a sim card slot
When you buy a tmobile phone it camoes with a sim card. If you already have a tmobile phone and break it you can buy a pre-paid phone and put your old sim card in it
Yes, provided your ATT phone is SIM unlocked.
yes you can but only in an att phone.
Yes, just switch the sim card.
If the T-Mobile phone is unlocked meaning the network unlock code has been given to the phone. Contact T-Mobile for the Unlock code after you have an active AT&T account and sim card.