Turn Cellular Data on or off. Go to Settings > Cellular, then tap Cellular Data. 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 .
Enable or disable 4G/LTE (varies by carrier): Using 4G or LTE 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 4G/LTE off to extend battery life. This option is not available in all areas. On
iPhone 6 and iPhone 6 Plus, there are options for turning off 4G/LTE, selecting Voice & Data
(VoLTE), or Data Only.
Voice & Data (some carriers): Choose LTE to load data faster. Choose slower speeds to
increase battery life.
Set up Personal Hotspot: Personal Hotspot shares the Internet connection on iPhone with your
computer and other iOS devices. See .
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 back it up, then erase all content and your
personal information. If you’ve enabled Find My iPhone (see ), Activation Lock is
on. You need to turn off Activation Lock before the new owner can activate iPhone under his or her
own account.
Back up iPhone. See .
Phone settings
Personal Hotspot
Find My iPhone
Back up iPhone
