IPhone not showing up under devices?

I plugged my iPhone 3GS into my computer today and it didn't show up under devices. I was adding music from CDs to iTunes but I couldn't sync them to my phone because it didn't show up under devices. It charged so I know the USB cable is fine. How do I make it show up?

Check your device visibile settings

Restart your phone first, then iTunes, and if that doesn't work reboot the computer. If it still isn't working, reinstall iTunes.

Try unistalling the iPhone device driver (aka apple mobile device). And when you replug your iPhone, it will reinstall itself. To uninstall it, just connect your iPhone to your PC, and go in the device manager, and in portable devices uninstall both Apple iPhone and Apple Mobile Device, unplug and replug your iPhone, and it should reinstall itself…

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