Hi I want know, how can I do to make LTE or 3G Works? Or How can I actívate the 1900 signal?? Because the Official Page said: Network Frequency 2G:GSM/900/1800/850/1900MHz 3G:WCDMA900/1900/2100MHz 4G:LTE800/900/1800/2100/2800MHz Please the phone is amazing, but only this is the Stone in the shoe. :D