Q: my phone has no sound after updated ios 7.1.2

Hi hojj926,

Thanks for using the Apple Support Communities!

I understand that you are not hearing any sound from your iPhone and you first noticed this situation after an update. To begin troubleshooting, I suggest reading over and working through the suggested steps from the following article. 

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

Best!