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110 Appendix B Tips and Troubleshooting
If you can’t make or receive calls, send or receive text messages, or access email or
the web
 Check the cell signal indicator in the status bar at the top of the screen. If there
are no bars, or if it says “No service,” try moving to a different location. If you’re
indoors, try going outdoors or moving closer to a window.
 Check to make sure you’re in an area with network coverage. Go to www.att.com to
see network coverage areas.
 Make sure airplane mode isn’t on. From the Home screen choose Settings, then turn
airplane mode off.
 If that doesn’t work, turn airplane mode on, wait 15 seconds, then turn airplane mode
off again.
 Make sure to include an area code for every phone number in your contacts list that
you use to send or receive text messages.
 If that doesn’t work, turn iPhone off and turn it 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.
 If that doesn’t work, there may be a problem with your wireless service. Call AT&T or
go to www.att.com.
 If that doesn’t work, restore the iPhone software. See “Updating and Restoring
iPhone Software” on page 114.
Note: iPhone doesn’t support MMS messages. If someone sends an MMS message to
your iPhone, it won’t be received.
If iPhone won’t turn on, or if the display freezes or doesn’t respond
 Press and hold the Home button below the screen for at least six seconds, until
the application you were using quits.
 If that doesn’t work, turn iPhone off and turn it on again. Press and hold the Sleep/
Wake button on top of iPhone for a few seconds until a red slider appears, and then
drag the slider. Then press and hold the Sleep/Wake button until the Apple logo
appears.
 If that doesn’t work, reset iPhone. Press and hold both the Sleep/Wake button and
the Home button for at least ten seconds, until the Apple logo appears.
If iPhone continues to freeze or not respond after you reset it
 Reset iPhone settings. From the Home screen choose Settings > General > Reset >
Reset All Settings. All your preferences are reset, but no data or media is deleted.
 If that doesn’t work, erase all content on iPhone. From the Home screen choose
Settings > General > Reset > “Erase All Content and Settings.” All your preferences
and other data are removed from iPhone.
 If that doesn’t work, restore the iPhone software. See “Updating and Restoring
iPhone Software” on page 114.