Thanks to the motion control options on the Ascend P6, you just need to turn over your phone (Flip over) to mute the sounds and vibration of incoming calls, Alarm and Timers. To enable Flip do as follows:
1. Open Settings and go to All.
2. Under Device settings, go to Motion Control
3. Use the toggle button on the top right to enable the Motion Control.
4. Make sure to enable Flip to be able to Flip to Mute the sounds and vibration on your Huawei device.