Apple ME323LL/A User Manual

Page of 162
 
Chapter  3    
Basics 
40
Note:  Connecting iPhone to a power outlet can start an iCloud backup or wireless iTunes 
syncing. See 
 on page 156 and 
 on page 18.
You can also charge the battery by connecting iPhone to your computer, which also allows you 
to sync iPhone with iTunes. See 
 on page 18. Unless your keyboard has a high-
power USB 2.0 or 3.0 port, you must connect iPhone to a USB 2.0 or 3.0 port on your computer.
Important:  
The iPhone battery may drain instead of charge, if iPhone is connected to a computer 
that’s turned off or is in sleep or standby mode.
The battery icon in the upper-right corner shows the battery level or charging status. To display 
the percentage of battery charge remaining, go to Settings > General > Usage. When syncing or 
using iPhone, it may take longer to charge the battery.
Important:  
If iPhone is very low on power, it may display an image of a nearly depleted battery, 
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 the low-battery 
image appears.
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 Apple 
Authorized Service Provider. See 
.
Travel with iPhone
If you travel outside your carrier’s network area, you can avoid roaming charges by turning off 
voice and data roaming services in Settings > Cellular. See 
 on page 157.
Some airlines let you keep your iPhone turned on if you switch to Airplane Mode. You can’t make 
calls or use Bluetooth, but you can listen to music, play games, watch videos, or use other apps 
that don’t require network or phone connections. If the airline allows it, you can turn Wi-Fi or 
Bluetooth back on to enable those services, even while in Airplane Mode. 
Turn on Airplane Mode. Swipe up from the bottom edge of the screen to open Control Center, 
then tap  . You can also turn Airplane Mode on or off in Settings. When airplane mode is on, 
 appears in the status bar at the top of the screen. 
Wi-Fi and Bluetooth can also be turned on or off in Control Center.
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