Apple ME323LL/A User Manual

Page of 162
 
Appendix D    
Safety, Handling, & Support 
158
If Cellular Data is off, all data services use only Wi-Fi—including email, web browsing, push 
notifications, and other services. If Cellular Data is on, carrier charges may apply. For example, 
using certain features and services that transfer data, such as Siri and Messages, could result in 
charges to your data plan.
Turn Cellular Data on or off. Go to Settings > Cellular. The following options may also be available:
 
Turn Voice Roaming on or off (CDMA):  Turn Voice Roaming off to avoid charges from using other 
carrier’s networks. When your carrier’s network isn’t available, iPhone won’t have cellular (data 
or voice) service.
 
Turn Data Roaming on or off:  Data Roaming permits Internet access over a cellular data 
network when you’re in an area not covered by your carrier’s network. When you’re traveling, 
you can turn off Data Roaming to avoid roaming charges. See 
 on page 49.
 
Enable or disable 3G:  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 off to 
extend battery life. This option is not available in all areas.
Set whether cellular data is used for apps and services. Go to Settings > Cellular, then turn 
cellular data on or off for any app that can use cellular data. If a setting is off, iPhone uses only 
Wi-Fi for that service. The iTunes setting includes both iTunes Match and automatic downloads 
from the iTunes Store and the App Store.
Sell or give away iPhone?
Before you sell or give away your iPhone, be sure to erase all content and your personal 
information. If you’ve enabled Find My iPhone (see 
 on page 39), Activation Lock 
is on. You need to turn off Activation Lock before the new owner can activate iPhone under his 
or her own account.
Erase iPhone and remove Activation Lock. Go to Settings > General > Reset > Erase All Content 
and Settings.
.
Learn more, service, and support
Refer to the following resources to get more iPhone-related safety, software, and 
service information.
To learn about
Do this
Using iPhone safely
See 
 on page 151.
iPhone service and support, tips, forums,  
and Apple software downloads
Go to 
Service and support from your carrier
Contact your carrier or go to your carrier’s website.
The latest information about iPhone
Go to 
Managing your Apple ID account
Go to 
Using iCloud
Go to 
.
Using iTunes
Open iTunes and choose Help > iTunes Help. For an 
online iTunes tutorial (may not be available in all 
areas), go to 
Using other Apple iOS apps
Go to 
.
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