[Phone] Effective area for double tapping to wake up your phone

In order to prevent users from inadvertent tap to wake up the phone, there is an area (1 cm from the edge of LCD visible area) in which double tapping will not take effect, as shown in picture below by grey color. If you would like to wake up your phone by double tapping, please remember the grey area will not be available.

In addition, please note double tap will NOT be effective in the following conditions. 

1. An object above the phone that affects proximity sensor.

2. The distance between the two taps more than 1 cm, or the interval longer than 0.62 seconds. 

3. Tapping the three virtual keys.