5.5" HD Display Unlocked Android Smartphones 4G GSM USA Worldwide Dual Sim Quad Core - Plum Z550 - White 5.5" HD Display. 8MPX Auto Focus Camera - 2 MPX Front Camera- Video 1080p, Built-in FM Radio 4G HSPA+, Dual SIM, Android 4.4, Unlocked GSM Quad Band USA & World Phone 1.3Ghz Quad-Core Processor, 8GB Internal Memory, 1GB RAM. Micro SD Slot up to 64GB GPS, Bluetooth, WiFi, Hotspot. 2200mAh Battery- 15 Talk Time. Universal Micro USB Charger. This Device will Work with AT&T, T-Mobile, Metro PCS, Simple Mobile, Tracfone, Cricket Wireless, Net10, Speedtalk, Straight Talk, Telcel America, Lyca, Go Smart, H2O Wireless, PureTalk USA, Walmart Family Mobile and All GSM Networks in USA & Worldwide. This Device will not work with CDMA Carriers like Sprint, Verizon, Boost, Virgin or any other CDMA service provider