FOR HELP SEE: www.straighttalksim.com/support.php This Micro SIM works on AT&T"s towers and is designed to fit most modern smartphones such as the iPhone 4 and 4s (but not the iPhone 5). A guide is included to walk you through the steps of setting up the card in your phone. -Unlimited GSM service on AT&T -$45 per month - Unlimited Data, Talk & Text -$60 Unlimited International Plan with Unlimited Nationwide Minutes, Unlimited Messages & Unlimited data plus Unlimited* International calling to over 1,000 destinations including cellulars in Mexico, Canada, India and china. -No contracts, bills, or credit checks -Keep your phone number You will need a compatible GSM AT&T phone. You may also use an Unlocked GSM phone compatible with AT&T. This program/offering does not work with Straight Talk, TracFone, NET10, SafeLink, BlackBerry and/or CDMA phones. To Activate your service, you will need a Service Card. You may purchase a Service Card with a Debit card or Credit card. APN data settings must be updated on your phone. These settings can be found at apn.straighttalksim.com. Updating your APN settings does not guarantee MMS (Multimedia/Picture Messaging) will work. MMS is dependent upon your phone model"s limitations. HOW IT WORKS 1. Bring an AT&T compatible GSM phone, or an unlocked GSM phone 2. Purchase a Straight Talk SIM card & Airtime bundle 3. Activate your SIM Follow the easy instructions included in the activation guide that comes with your SIM card. You will need an Unlimited Service Plan to activate your SIM. Buy it during checkout or during the Activation process. 4. Update your data settingsFor help see the PHONE PROGRAMMING link at http://straighttalksim.com/support.php