The smartphone sensors measure physical quantities and transmit them to the application processor. The phones’s accelerometer is a built-in electronic component that measures tilt and motion. The proximity sensor detects when a user is holding the phone near their face during a call and turns off the display to prevent keypad presses and battery consumption from the display. The Desire 728 Ultra Edition has Dual SIM capability, which means that you can insert two different SIM cards and use them both from one phone.