Want the answers to questions about the iPhone? You'll find questions and answers here.
I just update iPhone 4s to iOS 6.1.3 from 6.1.2; after update one problem occur. My phone's speaker and the headphone does not work sometime. In Music player, the volume bar does not show. But sometime this problem automatically resolve but after few minute again problem occur. No response to the side volume button as well no matter it is in app(youtube) or in music player mode. Anyone got the same issue?
Welcome to Apple Support Communities! And thanks for the question. There's two articles I'd like to point you to - try going through them in order, checking after each step to see if the issue is resolved.
If following those steps do not work, you can try restoring your iPhone: