GSM Unlocked cell phone is compatible with carriers like AT&T, T-Mobile, H20, Simple Mobile, Consumer Cellular, Metro PCS, Cricket, Straight Talk GSM, Tracfone GSM, Ting GSM, Project Fi GSM, and other prepaid carriers. The unlocked cell phone will NOT work with CDMA Carriers like Verizon, Sprint, Boost Mobile, Xfinity Mobile, Virgin Mobile, Straight Talk CDMA, Tracfone CDMA, Total Wireless, Ting Wireless CDMA, Project Fi CDMA or U.S Cellular. CDMA carrier requires you to purchase their carrier branded phones only. Even if the listing says GSM Unlocked it will not work with CDMA Carriers. REPUBLIC WIRELESS has hardware limitations and would only work on USA Version phones and would not work on International Version phones. - International Version - MAIN FRAME : Chipset : Qualcomm SDM730 Snapdragon 730 (8 nm) CPU's : Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver) GPU : Adreno 618OS : Android 9.0 (Pie); One UISTORAGESIM : Dual SIM (Nano-SIM, dual stand-by) ROM : 128GB RAM : 8GB External Support : No - SIGNALS2G : 850 / 900 / 1800 / 1900 - GSM - SIM 1 & SIM 2 (dual-SIM model only)3G: 850 / 900 / 1700(AWS) / 1900 / 2100 - HSDPA 4G LTE : Cat11 (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66) - LTE Network Status : Factory Unlocked Release Date : 2019, May - BUILDMeasurements : 165.2 x 76.5 x 9.3 mm (6.50 x 3.01 x 0.37 in) Weight : 220 g (7.76 oz) Safety : Front glass (Gorilla Glass 3), back glass (Gorilla Glass 6), aluminum frame