- If cellular data is not working on your iPhone, there are several ways to potentially resolve the issue.
- To fix your cellular data, try toggling both Airplane mode and Mobile Data in the Control Center and reseating your SIM card.
- Here are eight of the top ways to fix your iPhone when your cellular data isn’t working.
It’s the mundane problems with technology that are the most frustrating. Your iPhone is on and seemingly connected, for example, but you can’t get data in any apps and you see an error message in Safari that your phone isn’t connected to the internet.
Why is your iPhone cellular data not working? Let’s look at these easy ways to fix your iPhone cellular data problem now.
How to Fix iPhone Cellular Data Not Working
Make Sure You Haven’t Exceeded Your Mobile Data Limit
The first thing you should do if cellular data is not working on your iPhone is to make sure that you haven’t exceeded the allowed data limit. Some carriers allow you to continue using the internet at a fee even after you’ve used up the allowed data, while others forbid internet access.
If this is the cause, you’ll need to reactivate your mobile plan or top up your quota, then you’re good to go! Cellular data should start working on your iPhone immediately. Contact your carrier’s support (AT&T, Verizon, T-Mobile) if you have issues doing so, and consider limiting your data usage in the future to avoid running out again.
Turn Off Your Wi-Fi
Go to Settings > Wi-Fi and tap the Wi-Fi toggle to temporarily disable it. Your iPhone will be forced to switch over to cellular data and use that instead. This worked on both my iPhone 17 Pro and my wife’s iPhone 16.
Sometimes your iPhone can get caught between a Wi-Fi network and cellular, and stick with Wi-Fi even when that’s the wrong choice. If you are outside your home, for example, you might be just outside the practical range of your Wi-Fi network, and your iPhone should switch over to cellular data. But because the phone can still connect to your Wi-Fi network — barely — it stays connected, even though it can’t exchange any data.
Toggle Airplane Mode
Go to Settings and look for the Airplane mode toggle. If it’s
already on, that is probably your problem right there — when
Airplane Mode is turned on, Cellular Data is automatically turned
off on an iPhone. If it’s off, turn it on, wait a few seconds,
and then turn it off.
While there are a lot of reasons cellular data may not be
working on your iPhone, toggling your wireless connection off and
back on again is one quick and easy trick that often gets it
working again.
Toggle Your Mobile Data Setting
Go to Settings and tap Cellular. If Cellular Data is off, tap it to turn it on. Otherwise, tap it to disable, wait a moment, and tap it again to turn it back on.
Disabling and re-enabling mobile data sometimes helps fix minor glitches by giving your phone a fresh chance to re-establish an internet link. It’s also possible that mobile data was accidentally toggled off on your iPhone even if Airplane mode is not enabled. Now test your internet connection and see if that solved your problem.
Check for a Carrier Settings Update
Check for a carrier settings update by going to Settings > General > About. If there’s a carrier update available, you’ll be prompted to install it. Since cellular data is not working on your iPhone, make sure that your device is connected to a working Wi-Fi before checking.
Apple and your wireless carrier release updates in order to help your iPhone connect to your wireless carrier’s network more efficiently. A problem can occur if your cellular provider has recently updated its configuration and the changes failed to update automatically on your phone for some reason.
Reseat Your SIM Card
If your iPhone has a physical SIM card, find the SIM card removal tool that came with your phone — if that’s no longer around, you can also use a thin paper clip. Insert the tool into the hole near the SIM card tray and push gently but firmly until the tray pops out. Make sure the SIM card is seated properly in its tray and then carefully reinsert it.
Reseating the SIM card is not hard to do and can help fix cellular data issues caused by a loose or improperly seated card.
Restart Your iPhone
Go to Settings > General > Shut Down. Drag the Slide to Power off slider from left to right to turn off your iPhone. Wait a few seconds, then press and hold the side button until the Apple logo flashes onto the center of the screen.
If nothing above has worked, restarting your iPhone should clear out any temporary hiccups blocking your mobile data. It only takes a few minutes to shut it off and then turn it back on again. If a regular restart doesn’t work, you may want to force your iPhone to restart. See our guide to learn how to force restart an iPhone.
Reset Your Network Settings
Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. You may have to enter your passcode to proceed.
Save this troubleshooting step for last, because when you reset your network settings, all saved networks, paired Bluetooth devices and Wi-Fi passwords will be erased, so you’ll need to manually reconnect to all your favorite networks. If Cellular Data still doesn’t work on your iPhone, it could be a result of corruption in your phone’s network settings, which this reset can clear up.
Solved: iPhone Cellular Data Not Working
We’ve seen how to fix the issue of your iPhone mobile data not working. To rule out issues, first check whether you have an active mobile plan with sufficient data left. Also, ensure that your device’s airplane mode is turned off.
If your iPhone still can’t connect, Apple advises you to contact your carrier to see if there are other causes. For example, an outage in your area might cause all connections to fail. In case your carrier responds that there’s no problem with your account or network, you’ll have to reach out to Apple Support to resolve the issue. It may be a problem with your iPhone.
Frequently Asked Questions About iPhone Cellular Data Not Working
Several things can cause cellular data to stop working on an iPhone. You may have used up your mobile data allowance for the billing cycle, which some carriers respond to by cutting off internet access entirely. Your iPhone might also be clinging to a weak Wi-Fi signal instead of switching over to cellular, especially if you're near the edge of your home network's range. Other common culprits include Airplane Mode being turned on accidentally, the Cellular Data toggle being switched off, or a pending carrier settings update that hasn't been installed. A loose or improperly seated SIM card can also break the connection, and in some cases, corrupted network settings on the iPhone itself are to blame.
Yes, turning on Airplane Mode automatically disables cellular data on your iPhone. If you can't figure out why your data isn't working, check Airplane Mode first — it's one of the most overlooked causes. Toggling Airplane Mode on, waiting a few seconds, and then turning it back off can also help refresh your iPhone's connection to the cellular network when data has stopped working for no obvious reason.
A carrier settings update is a small file released by Apple and your wireless carrier that helps your iPhone connect to the carrier's network more efficiently. If your carrier has recently changed its network configuration and your iPhone didn't pick up those changes automatically, cellular data can stop working or behave unreliably. You can check for a pending update by going to Settings > General > About — if one is available, you'll see a prompt to install it. Your iPhone needs to be connected to Wi-Fi before checking, since cellular data may not be functional at that point.
No. Resetting network settings does not touch your photos, apps, messages, or any other personal content on your iPhone. What it does erase is all saved Wi-Fi networks and their passwords, paired Bluetooth devices, and any stored network configurations. You'll need to reconnect to your Wi-Fi networks and re-pair your Bluetooth accessories afterward, but everything else on your iPhone stays exactly as it was.
If you've worked through every software troubleshooting step and your cellular data still isn't working, the problem may be hardware-related. Apple recommends contacting your carrier first to rule out account problems or a network outage in your area. If your carrier confirms that everything on their end is fine, reach out to Apple Support — the issue may be with the iPhone itself, and you might need to have the device serviced or replaced.
