Straight Talk AT&T Compatible SIM card for AT&T phone or Unlocked GSM Phone including iPhone 3 & 4 Samsung Galaxy S3, S4, S5 Galaxy Note 2 3 & 4 and other GSM phones This SIM card is for Straight Talk bring your own phone $45 plan which includes unlimited talk/text/data. Includes 5GB of LTE data. It only works on AT&T tower, NOT COMPATIBLE with CDMA or Verizon branded phone. For AT&T branded or factory unlocked iPhone 3, 3S, 4, 4S. NOT COMPATIBLE with iPhone 5 and 6 (need Nano SIM). For AT&T branded or factory unlocked Samsung Galaxy phones S3, S4 and S5, Note 2, 3, 4. NOT COMPATIBLE with S6 series and Note 5 (need Nano SIM). For other GSM unlocked phone such as Blu, Huawei, OnePlus, Motorola, Nokia and other brands. Operates on ATT tower through Straight Talk. NOT COMPATIBLE woth CDMA OR VERIZON branded phone that works on VERIZON tower. Please verify your phone first before purchasing.