Dual Nano-SIM (4G + 4G) ; 3G WCDMA 850 / 900 / 1900 MHz ; 4G LTE B1 / B3 / B5 / B7 / B8 / B28 / B38 / B39 / B40 / B41 ; 4G LTE does not work in the US ; 3G works with AT&T and AT&T based GSM carriers ; DOES NOT work with Sprint, Verizon, U.S. Cellular and all other CDMA carriers ; LTE compatibility: This is Taiwan stock, varies per carrier (ensure to check with your carrier before purchase)
Qualcomm Snapdragon 660 AIE CPU ; 128GB ROM, 6GB RAM ; Supports microSD, up to 256 GB (uses SIM 2 slot) ; 3200 mAh battery.
Main Camera: Dual: 12 MP (f/1.8, Dual Pixel PDAF) + 5 MP (f/2.4), phase detection autofocus, LED flash; Front Camera: 12 MP, f/2.0.
6.28 inches, Super AMOLED capacitive touchscreen, 16M colors.
Package Content : Vivo X21 , Earphone , microUSB to USB Cable , USB Power Adapter , SIM Ejector , Protective Case , Protective Film (applied) , Documentation. PLEASE NOTE: this is a Taiwan version of the phone that comes with no warranty in the US.