Why volume bar on my iPhone disappeared?

Okay, so this happened about two days ago.
With or without headphone it still disappears. It goes in and out, like the actually volume bar appears and disappears. When I push the "+" and "-" keys on the side the icon shows up but the volume bar on the icon is gone

I have the iPhone 3Gs v5.0.1

(please don't say to clean out the headphone jack or anything else, I already clean that stuff).

No matter what app I'm on it still does it, Netflix, iPod, watching videos on the camera app, YouTube, ect.

If your iPods plugged into a speaker or I home with volume buttons then it will go away if its not I would call apple

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  • Volume slider disappeared on iPhone 4s I was going on my phone to listen to music but the volume slider wasn't there so i turned off and turned on my phone and it was back but then later while i had ear buds in it went away again so i just unplugged it and put it back in. Its disappeared again now and i don't know what to do?