Restore from an iCloud backup. Reset iPhone to erase all content and settings, then choose Restore
from a Backup and sign in to iCloud in Setup Assistant. See .
Restore from an iTunes backup. Connect iPhone to the computer you normally sync with, select
iPhone in the iTunes window, then click Restore in the Summary pane.
When the iPhone software is restored, you can either set it up as a new iPhone, or restore your
music, videos, app data, and other content from a backup.
For more information about restoring iPhone software, see .
Cellular settings
Use Cellular settings to turn cellular data and roaming on or off, set which apps and services use
cellular data, see call time and cellular data usage, and set other cellular options.
If iPhone is connected to the Internet via the cellular data network, the LTE, 4G, 3G, E, or GPRS
icon appears in the status bar.
LTE, 4G, and 3G service on GSM cellular networks support simultaneous voice and data
communications. For all other cellular connections, you can’t use Internet services while you’re
talking on the phone unless iPhone also has a Wi-Fi connection to the Internet. Depending on your
network connection, you may not be able to receive calls while iPhone transfers data over the
cellular network—when downloading a webpage, for example.
GSM networks: On an EDGE or GPRS connection, incoming calls may go directly to voicemail
during data transfers. For incoming calls that you answer, data transfers are paused.
CDMA networks: On EV-DO connections, data transfers are paused when you answer incoming
calls. On 1xRTT connections, incoming calls may go directly to voicemail during data transfers.
For incoming calls that you answer, data transfers are paused.
Data transfer resumes when you end the call.
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.
Restart or reset iPhone
support.apple.com/HT201252
