iphone 3g usb not recognized

[Rubo]

I am facing the same problem with iphone. I plugged my iphone I had a blue screen and then restarted my computer, But then also iphone 3g usb not recognized. I don't know what's the problem ?

Can someone help ?

[Caesar]

If iphone 3g usb not recognized follow the steps.

• The iPhone battery might need to be recharged.
  
• If this does not work, disconnect other USB devices from your computer and connect the iPhone to another USB 2.0 port on your computer (not on your keyboard).
  
• If this does not turn off the iPhone then turn it on. Press the button On / Watch the iPhone and hold for a few seconds until the appearance of a red slider, then drag it. Then press the button On / Standby and hold until you see the Apple logo.
  
• If this does not, restart your computer and then reconnect to your iPhone.
  

[KADEN]

The iPhone requires a functioning USB 2.0. Consult your computer documentation to verify that the USB ports are USB 2.0 ports for high-power. Try connecting the iPhone to another USB port, preferably a port built into the computer, rather than an external USB hub. It is not recommended to connect the iPhone to the USB ports on your keyboard.

[Maceo]

iPhone requires two important pieces of software to operate properly on Windows. First, the driver must be installed; for iPhone the driver is USBAAPL.SYS. Second, Apple Mobile Device Support must be installed as a Windows Service. If these are not installed, see the Reinstall iTunes section below.

Verify that the driver is installed by connecting iPhone to the computer and following these steps:

• On the Start menu, click Run.
• In the Open field, type devmgmt.msc and click OK. A list of devices will be displayed.
• Scroll down to Universal Serial Bus controllers and click the small plus sign to expand this group. iPhone will be listed as either Apple iPhone or Apple Mobile Device depending on the version of the driver installed.
• Right-click Apple iPhone (or Apple Mobile Device) and choose Properties from the shortcut menu.
• When the Properties window opens, select the Driver tab.
• Click Driver Details to view more information.

[tmlalazi]

I know it's a late reply but incase someone still wants to know, it may be a good idea getting a genuine Iphone USB cable as some cheap ones can only charge but not communicate with the computer. This is probably the best fix for this problem.