SIM card
If you were given a SIM card to install, install it before setting up iPhone.
Important: A Micro-SIM card (iPhone 4s) or a Nano-SIM card (iPhone 5 or later) is required to
use cellular services when connecting to GSM networks and some CDMA networks. iPhone that’s
been activated on a CDMA wireless network may also use a SIM card for connecting to a GSM
network, primarily for international roaming. Your iPhone is subject to your wireless service
provider’s policies, which may include restrictions on switching service providers and roaming,
even after conclusion of any required minimum service contract. Contact your wireless service
provider for more details. Availability of cellular capabilities depends on the wireless network.
Status icons
The icons in the status bar at the top of the screen give information about iPhone:
Status icon What it means
Cell signal
You’re in range of the cellular network and can make and
receive calls. If there’s no signal, “No service” appears.
Airplane mode
Airplane mode is on—you can’t make phone calls, and other
wireless functions may be disabled. See .
LTE
Your carrier’s LTE network is available, and iPhone can connect
to the Internet over that network. (iPhone 5 or later. Not
available in all areas.) See .
UMTS
Your carrier’s 4G UMTS (GSM) or LTE network (depending on
carrier) is available, and iPhone can connect to the Internet over
that network. (Not available in all areas.) See .
UMTS/EV-DO
Travel with iPhone
Cellular settings
Cellular settings
