MAX ONE 5.5 Unlocked - Black 5.5 Unlocked Sims Phone, Android 4.4 Kit Kat 1.3GHz Quad Core Processor with, 1GB RAM + 8GB Rom GSM Quad Band 4G HSPA+ (850/1900/2100): US Compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, MetroPCS, Tracfone, Straight Talk and others 155.7 x 76.6 x 6x9 mm