as long as the phone is unlocked you should be fine. however in some cases the phone needs a data plan to work.
Yes, provided your ATT phone is SIM unlocked.
No. The sim card would not be inter-carrier compatible.
Yes, provided your ATT phone is SIM unlocked.
Yes, only if it is unlocked.
An unlocked phone can accept the SIM card from any cell phone provider. If you have an ATT SIM card, you can use it in an unlocked phone. A locked phone is created by the provider to force the use of its service; an unlocked phone can take any SIM card.
No, you need the same carrier phone or an unlocked phone.
You can put any SIM card in an unlocked cell phone.
No the phone should not have a problem with reding the sim card as long as the sony ericsson is unlocked josh
None. You need to have a either an unlocked phone or an actual Metro PCS phone.
Env would not work on ATT as the phone would not be compatible to the technology used by the carrier. Env is a CDMA phone, while ATT is a GSM phone, and these two technologies are not compatible with each other.
On Cingular/ATT GSM it works just fine. No email though.
Iphone(they are both $200)