4s, just updated to ios7, audio problems

Question

I updated to ios7 yesterday and everything was working fine, no problems for approx 24 hours.
Today while watching video on the Netflix app, the audio stopped working.
Now, this is what I have:
-Ringer does not work when i receive calls
-Notification sounds do not work
-there is no audio with youtube, netflix or video files
-no audio with itunes music
-sound toggle (up and down) do nothing.
-the silent/vibrate toggle above the audio toggles causes phone to vibrate but does not effect this audio problem
however;
In Settings; Sounds:
     -when I use the volume slider for 'ringer and alerts' it plays the tone,
     -when I select a different ringtone, it plays the tone,
     -when I select a different text tone (tweet,mail etc/all others), it vibrates but DOES NOT play the tone
Additionally,
     -audio works for phone calls on both regular and speakerphone settings
     -audio for all apps works when earbuds/headphones are plugged in, through headphones
Troubleshooting attemts so far:
-vibrate toggle attempted, not the issue
-multiple soft and hard resets, no fix
-cleaned charging port, no fix
-cleaned earphone jack, no fix,
This appears to be a software update or app/setting compatibility issue.  I've read other threads that suggest turning off 'airplay'... i cannot find airplay anywhere in the settings or on my iphone.  I am not excited about going through the hassle of restoring my phone, losing music and saved app data.
I find it difficult to impossible to revert back to ios6.x.x and cannot restore my last backup from that version of ios.
My frustration abounds and makes competitor Android devices seem enticing.
Please Apple, help me

Answer 1

I encountered the same problem lastweek, as much to my surprise after reading all blogs & fixes, here's what i did...
1. I did a "Restore All" using iTunes directly connected to a pc/desktop, the reformat & reprograming only took 1hour to be exact, unlike wifi update, it took me 5hours & 45mins for total completeion of update iOs7 (which later on had problems due to unstable wifi connection)
Still the earpiece didn't work, but the phone performs fine now w/o a glitch, flawless...
2. My last resort before claiming my warranty or having it fixed, i did what others did that made their phone work, believe it or not, neither did i, it yes was a hardware problem, a simple "LOOSE CONTACT" on the earpiece...
So what i did after vacum & cleanning it up thoroughly, applying controlled great pressure directly on the earpiece like cpr, i toggled my phone w/ great force hitting the sides by hand, much like tapping it on my hand w/ great force while on a call switching from loudspeaker to normal earpiece, until such time in less than 5mins, whala, it worked i heard audio again on the earpiece...
I've been so careful w/ my unit w/ outmost premium accessories & care, ignoring the fact that sometimes bcoz of the great protection we ignore some minor mishaps like dropping it on the floor from our lap... As simple as that could be the cause... So, if u think at times u might have unconciously dropped it even w/ case on, it may have caused it...
I hope this helps & also fixes yours... I know what it feels...
But just incase it doesn't, then yes it's time to claim your warranty...