I've been having this issue for a while now and it's a little frustrating, hoping someone here would have some insight.

I installed an android head unit into my 2011 camry and used the built in app to program the volume and skip buttons on the steering wheel. I decided to go back to my stock radio so I reinstalled it and the buttons that I programmed on the android head unit no longer work on the stock radio. The volume and skip buttons

All the other steering wheel buttons work, like mode and pick up/hang up. I'm not sure if there's a way to clear the memory or something. I tried leaving the battery removed and also tried this method I found online but no luck unfortunately.

 

Disconnect your battery and wait 5min then,
Recheck your electrical connections at the radio( are all the plugs seated correctly and is wiring correct), otherwise it maybe your clock spring or buttons itself, in which you will need to remove the steering wheel/button assy