1.3 START-UP AND POWER LOSS
After download or device reset it is necessary to wait for about 2 minutes without
performing any action in order to make it possible a proper calibration of:
Proximity sensor.
Luminosity sensor.
Button presses.
For a correct calibration of the proximity and brightness sensors it is recommended not
to remain too close or place anything less than 50cm approximately and do not hit with
direct light to the device during this time.