How to mute incoming call ringtone or sound?

[sqa4life]

I was in a meeting and forgot to put my phone in silent mode. my phone was ringing and I was try to press the buttons on the side of the phone hoping that would mute the sound, but it didn't.

Is there a way we can mute the incoming ringtone, even temporary?

 

[estebanj]

Volume up/down mutes mine (stops the ringer).Slide to the left rejects the call and sends to voice mail.