Yes as long as the phone is att and has a sim card slot
You can change your sim card in any AT&T corp. store in the United States, as long as you have a valid state ID or military ID.
Yes, provided your ATT phone is SIM unlocked.
either call AT&T or you have to go to an AT&T store to activate it. If they can't, then you should buy a new SIM card
Yes, provided your ATT phone is SIM unlocked.
Try taking it to a att, verizon,t-mobile etc. store and see if they can give you a replacement
yes u can I had my att go phone unlocked and tried to use my sim card from st. talk which I found out uses att service towers in my area however, it didn't work. It stated "sim crash"
Yes!
The sim card will only work in a different phone if the phone is ulocked, in not, no
Could I put a simple mobile sin card to my HTC from ATT
Yes because ATT phones have sim cards, so you can simply transfer your sim card to another phone. However, the ATT website doesn't sell all their phones for use with gophone plans, so depending on the phone, you might have to buy it used or from another vendor.
any AT&T phone that can take that sort of sim card.