Why i lost all my sound in the Iphone 5 after updating it to 6.1?

Last night i updated my Iphone 5 to 6.1.3 that i forgot to do these months. But not i have done it, and i lost all of my sound, It is not on mute or silent mode.

It's broken the same thing happened to me. I know of a website that gives out free electronics! It works I've gotten multiple iPods and iPhones! Just complete an offer to show your not a robot. Have fun!

http://apple.freebiejeebies.co.uk/703769