currently have an Iphone 4S locked to AT&T. Im not sure but this is what I think. let me know if im right. I want to buy at&t sim card from the following link: www.wireless.att.com/cell-phone-service/cell-phone-details/?device=AT%26T+SIM+Card&q_sku=sku981990#f... I know that Iphone 4S uses a smaller sim card. I was thinking of cuting it to adjust it for the iphone 4s size and then to refill the card to use: $25 GoPhone® Refill Card from the following link: www.wireless.att.com/cell-phone-service/accessory-details/?q_sku=sku1150030#fbid=cpFvmI3MsG- I want to know if i can use this on my iphone 4S. The $25 gophone refill card gives 250 minutes for 90 days (no data no web). I only care for talking on the iphone 4S with the $25 refill card. So will the iphone 4S support this or not. If im incorrect please guide me. you already know my purpose: IPhone 4S with prepaid sim card and $25 refill card Please make recomendations if this do not work or let me know what can i do.