User Guide Part 1

DRAFT
Chapter 3 Basics 40
Important: If iPhone is very low on power, it may display one of the following images, indicating
that iPhone needs to charge for up to ten minutes before you can use it. If iPhone is extremely
low on power, the display may be blank for up to two minutes before one of the low-battery
images appears.
or
or
Rechargeable batteries have a limited number of charge cycles and may eventually need to
be replaced. The iPhone battery isn’t user replaceable; it can be replaced only by an authorized
service provider. See www.apple.com/batteries/replacements.html.
Using 3G loads Internet data faster in some cases, but may decrease battery performance. If
you’re making a lot of phone calls, you may want to turn 3G o to extend battery life. This
option is not available in all areas.
Usage information
View usage information: Go to Settings > General > Usage. You can:
•
See your cellular usage and reset statistics
•
View and delete iCloud backups, turn o backing up the Camera Roll, and buy additional
storage
•
View each app’s storage
•
Display battery level as a percentage
•
See the elapsed time since iPhone has been charged
Sounds
You can set iPhone to play a sound whenever you get a new message, email, call, Tweet,
Facebook post, voicemail, or reminder. You can also set sounds for appointments, sending an
email, pressing keys, and locking iPhone.
For information about silencing iPhone see Ring/Silent switch on page 11.
Change sound settings: Go to Settings > Sounds. Available options include:
•
Set whether iPhone vibrates when get a call.
•
Set whether iPhone vibrates when you turn on silent mode.
•
Adjust the ringer and alerts volume.
•
Prevent the side buttons from changing the ringer volume.
•
Set the ringtone. To set a ringtone for a person, go to their card in Contacts.
•
Set alert and other tones.
•
Turn on keyboard clicks and a sound for when when iPhone locks.
APPLE CONFIDENTIAL