See also:

Screen adjustment
The contrast and brightness of the screen display and the image the cam- era displays can be adjusted. The display can also be turned off, and/or changed to either day or night mode. SCREEN SETTI ...

Open source license
This product uses the following open source software. · T-Kernel This Product uses the Source Code of T-Kernel under T-License granted by the T-Engine Forum (www.t-engine.org). · C Library ...

When receiving a phone call
 - Answering the phone Press the off-hook switch.  - Refusing the call Press the on-hook switch. ...