Apple iphone 3g 16gb Guida Utente

Troubleshooting 

iTunes and Syncing 

  

The iPhone battery might need to be recharged. For information about charging 
iPhone, see “Charging the Battery” on page 33. 

  

Disconnect other USB devices from your computer and connect iPhone to a 
different USB 2.0 port on your computer (not on your keyboard). 

 

Turn iPhone off and back on again. Press and hold the Sleep/Wake button on top of 
iPhone for a few seconds until a red slider appears, then drag the slider. Then press 
and hold the Sleep/Wake button until the Apple logo appears. Tap Unlock and enter 
your SIM’s PIN if the SIM is locked. 

If you enter the PIN incorrectly three times, you may need to contact 

your carrier for a Personal Unlocking Key (PUK) to enable your SIM card again. 

  

Restart your computer and reconnect iPhone to your computer. 

  

Download and install (or reinstall) the latest version of iTunes from 
www.apple.com/itunes. 

  

The iPhone battery might need to be recharged. For information about charging 
iPhone, see “Charging the Battery” on page 33. 

  

Disconnect other USB devices from your computer and connect iPhone to a 
different USB 2.0 port on your computer (not on your keyboard). 

 

Turn iPhone off and back on again. Press and hold the Sleep/Wake button on top of 
iPhone for a few seconds until a red slider appears, then drag the slider. Then press 
and hold the Sleep/Wake button until the Apple logo appears. Tap Unlock and enter 
your SIM’s PIN if the SIM is locked. 

If you enter the PIN incorrectly three times, you may need to contact 

your carrier for a Personal Unlocking Key (PUK) to enable your SIM card again. 

  

Restart your computer and reconnect iPhone to your computer. 

  

Download and install (or reinstall) the latest version of iTunes from 
www.apple.com/itunes.