Samsung G900F Galaxy S5 - Factory Unlocked Phone - Retail Packaging (Charcoal Black) Compatible with 2G GSM 850 / 900 / 1800 / 1900, HSDPA 850 / 900 / 1900 / 2100 And LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600 Platform Android OS, v4.4.2 (Kit Kat) internal 16GB and micro SD, up to 128 GB. Micro-SIM Super AMOLED capacitive touchscreen with Corning Gorilla Glass 3 for protection Primary Camera 16MP and secondary 2MP Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.