Why does the flashlight on my Iphone 4 never go out completely?

When you turn the flashlight on and off the bulb stays in but only on a dim level (Low glow)

That suggests that a very tiny component in your iPhone 4 is starting to breakdown. To be honest, there's no real cost effective fix if this is the case. So long as it's not draining the battery, I'd live with it until you can replace the phone!

*Cost of component that is probably failing less than 5c, cost to replace $250+, and then there may be other things that start to go wrong!

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