How to view or change cellular data settings on iPhone

On iPhone, you can turn cellular data on or off, manage roaming and network options, and control which apps and services use cellular data.

With cellular data off, email, web browsing, notifications, and other data services use Wi-Fi only. If you’re traveling internationally, you can adjust roaming and network settings. You can also see how much data each app has used, and turn off cellular data for individual apps.

Here’s how to view or change cellular data settings on iPhone.

Note: For help with cellular network services, voicemail, and billing, contact your wireless service provider.

Turn cellular data on or off

With cellular data turned off, every data service, including email, web browsing, and notifications, sticks to Wi-Fi. Leave cellular data on, and carrier charges may apply. Features and services that transfer data, like Siri and Messages, could add charges to your data plan, for example.

Open the Settings app on your iPhone.
Tap Cellular and turn Cellular Data on or off.

Manage roaming and network options

You can adjust roaming and network settings when you’re traveling internationally or want more control over how iPhone uses your carrier’s network.

Open the Settings app on your iPhone.
Tap Cellular and tap Cellular Data Options.
Do any of the following:
- Avoid roaming charges: Turn off Data Roaming. When you’re in a region not covered by your carrier’s network, Data Roaming permits internet access over a cellular data network. When you’re traveling, turn off Data Roaming to avoid roaming charges. To stay connected while traveling, contact your carrier about international plans, or add a travel eSIM.
- Reduce cellular usage: Tap Data Mode, then choose Low Data Mode. This mode pauses automatic updates and background tasks when iPhone isn’t connected to Wi-Fi.

Depending on your iPhone model, carrier, and region, the following options may 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.
Enable or disable 4G/LTE: Using 4G or LTE loads internet data faster in some cases but may decrease battery performance. There may be options for turning off 4G/LTE or for selecting Voice & Data (VoLTE) or Data Only.

With a 5G data plan on iPhone 12 models and later, you can do the following:

Enable Smart Data mode to optimize battery life: Tap Voice & Data, then choose 5G Auto. In this mode, your iPhone automatically switches to LTE when 5G speeds don’t provide noticeably better performance.
Use higher-quality video and FaceTime HD on 5G networks: Tap Data Mode, then choose Allow More Data on 5G.
Turn off 5G: Tap Voice & Data, then choose LTE.

View and manage cellular data usage

For each app, you can see how much data it has used, and turn off cellular data for individual apps if you’d like.

Open the Settings app on your iPhone.
Tap Cellular, then do any of the following.
- Turn cellular data on or off for an app or service: Scroll down to the list of apps and services and turn an app or service on or off. When cellular data is off for an app, iPhone uses only Wi-Fi for that service.
- See how much data each app is using: Scroll down to your list of apps and tap Show All. The amount of cellular data used appears below each app. If you’re using Dual SIM, you can see how much data you’ve used with your selected cellular data number.
- See data used by system services: Scroll down to System Services (above the list of apps). Cellular data can’t be turned on or off for individual system services.
- Reset usage statistics: Scroll to the bottom, then tap Reset Statistics.