Cat B100 Unlocked GSM 3G Military Grade + IP67 Certified Cell Phone - Black 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 1700 / 1900 / 2100 IP67 certified & MIL-STD-810G certified; dust and water proof, Drop-to-concrete resistance up to 6 feet FM Radio, MP3/MP4 Player , Chipset: Mediatek MT6276W 3.2 Megapixel Camera (2048 x 1536 pixels) w/ Geo-tagging + Video Internal Memory: 128 MB ROM, 64 MB RAM + microSD Slot Expandable up to 32GB 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.