- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup. See:
- Restore to factory settings/new iOS device.
Well, this doesn't help either.
In the bottom bar there's just no scroller itself to adjust the volume.
Now it appears when the earphones are plugged in, but disappears back each time I unplug them.
For notifications and other stuff it still works perfectly, but when it comes to music/video player and applications, everything is like muted.