iPhone 3Gs no sound after 6.1.3 update

So I was just playing some music with my iPhone 3Gs when suddenly the sound goes off.. there was nothing.. even keyboard ticks everything theres no sound..
The sound works in earphones and also in calls (earpiece) but the speakers are not working..
I've searched the forum and other people have simillar problem with their iPhones 4, 4s and 5 running in 6.1.3.. The only solution they said was giving it to a local apple store.. but my warranty has expired and the apple store in my place is far away..
The volume bar is showing.. I can slide the volumes still.. no sound

I already tried to restore.. but still no luck of having sound..

Can someone please help.. cuz i know 6.1.3 is the last iOS in 3Gs.. and I dont wanna buy a new one..