Red Pocket Mobile UNLIMITED SIM Card Cellphone Accessory Compatible Carrier & Service: Red Pocket Dual SIM: Yes Brand: Red Pocket Mobile Features: GSM Service throughout the USA Works in any unlocked GSM handset that supports 850MHz and 1900 MHz GSM frequencies Easy, immediate activation process: website or toll-free Customer Service Unlimited Talk & Text in the 50 United States - 30 days of service upon activation Type: Micro Sim Duration: n/a Refill Amount: none