Existing customers must have have been active for at least 91 days and not have received airtime credit within the last 91 days to be eligible for the $45 airtime credit.</br>AT&T GoPhone SIM Activation kit?? includes $45 airtime credit</br>For new or existing GoPhone customres (NOT compatible with post-paid?? on-contract AT&T accounts)</br>Includes universal SIM card adapters?? compatible with all GSM unlocked and AT&T cell-phones</br>Postal Mail Delivery</br></br>Product Description</br></br>This SIM kit can be used to either extend your existing AT&T GoPhone service with a $45 credit?? OR to activate a new AT&T GoPhone plan. Kit includes a nano-sized SIM Card + universal SIM adapters for Micro/Regular sized SIM cards. <br><br><b>Existing customers must have have been active for at least 91 days and not have received airtime credit within the last 91 days to be eligible for the $45 airtime credit. <br></br><br/>http://www.amazon.com/gp/product/B01M3R8U39