How to Fix iPhone Could Not Activate Cellular Data Network?

Are you experiencing the frustrating pop-up message "Could Not Activate Cellular Data Network" error on your iPhone? This error message means that your iPhone can't use the data included in your cellular plan, and it prevents you from accessing the Internet, sending messages, or using various apps that require a data connection.

Fortunately, several proven methods can fix this issue and get your cellular data network back to normal. In this guide, we will show you why and how to fix iPhone could not activate cellular data network.

Reasons Why iPhone Could Not Activate Cellular Data Network

There could be several reasons why an iPhone could not activate cellular data network. Some common reasons include:

• 01 Weak or unstable cellular signal: When the signal strength is poor or fluctuating, the iPhone may fail to establish a stable data connection.
• 02 Carrier-related issues: Temporary outages, account restrictions, or an inactive data plan from the mobile carrier can prevent activation of the cellular data network.
• 03 Incorrect network or APN settings: Misconfigured Access Point Name (APN) or cellular settings can block the device from accessing mobile data services.
• 04 SIM card or eSIM problems: A damaged SIM card, improper insertion, or issues during eSIM activation can lead to failure in network registration.
• 05 Software bugs: System glitches in iOS or carrier settings can sometimes interfere with cellular data activation, especially after updates or system restores.
• 06 Outdated iOS or carrier settings: If the device software or carrier configuration is outdated, compatibility issues may prevent successful network connection.
• 07 VPN or configuration profile interference: Active VPNs or installed device management profiles may override or block cellular data routing.

Top 10 | Fix iPhone Could Not Activate Cellular Data Network

Due to the multitude of potential causes for could not activate cellular data network on iPhone, we'll outline the initial ways to try first and provide further troubleshooting if needed. Follow the ways sequentially and cease once the issue is resolved.

Fix 1. Turn On Cellular Data

It is possible that your iPhone could not activate cellular data network because you've accidentally turned off cellular data. Thus, you should check whether cellular data is turned on. Here's how:

• Step 1. Open the Settings app, and tap Cellular. Make sure the Cellular Data toggle switch is enabled.
• Step 2. If the slider is already set to the on position, you can switch it off, wait a moment, and then toggling it back to the on/green button. This action will reset your connection and likely resolve the error.
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Fix 2. Turn Off Airplane Mode

Airplane mode disables all network functions on the iPhone. If you accidentally turn on Airplane Mode, cellular data networks won't work. To troubleshoot could not activate cellular data network on iPhone, make sure the Airplane Mode is turned off.

• Step 1. Launch the Settings app, locate Airplane Mode, and make sure the toggle button to the right of it slides off.
• Step 2. Alternatively, you can swipe down from the top right corner of the screen to access the Control Center, then check if the airplane pattern turns yellow, if so, it proves that Airplane Mode has been activated, tap the pattern to turn it off.
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Fix 3. Reboot Your iPhone

Reboot can resolve system bugs without data loss. By restarting, your iPhone will re-establish the network connection. it may solve the problem of cellular data network not being activated. Here's how to restart different models of iPhone:

• For iPhone X or later models: Press and hold the Side and one of the volume buttons, then a slider will appear on the screen indicating "slide to power off." Swipe the slider to the right to power off your iPhone. Wait for a while, press and hold the Side button again until you see the Apple logo appear on the screen.
• For iPhone 6, 7, 8, or SE (2nd or 3rd generation): Press and hold the side button until the power-off slider is displayed. Slide the slider to the right. Wait about 30 seconds, and press and hold the side button until the Apple logo appears.
• For iPhone SE (1st generation), 5, or earlier: Press and hold the top button until the power-off slider is displayed. Slide the slider, then allow your device 30 seconds to power off. To power your device back on, press and hold the top button until the Apple logo appears.

Fix 4. Pull Out And Reinsert the SIM card

The SIM card in your iPhone allows it to connect to your carrier's cellular data network. If the SIM card is loose, improperly seated, or temporarily not recognized, it can cause the error "Could not activate cellular data network." Removing and reinserting the SIM card helps refresh the connection between your device and the carrier.

• Step 1. Prepare a SIM eject tool or a paper clip. Then locate the SIM tray on the side of your iPhone.
• Step 2. Insert the tool into the small hole to eject the tray and carefully remove the SIM card. Wait a few seconds to allow the connection to reset.
• Step 3. After that, place the SIM card back correctly into the tray and insert it into the phone. Finally, check if the cellular data network reconnects.
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Fix 5. Reset Network Settings

Your iPhone houses numerous network-related settings and preferences, collectively referred to as Network Settings. If any of these settings become corrupted, it may hinder your access to cellular data networks. Resetting your iPhone's network settings will generate new settings, and it automatically resolves the issue of could not activate cellular data network.

• Step 1. Locate the Settings app in the iPhone main menu, then tap General option, and slide to the bottom to select Transfer or Reset iPhone. Tap the Reset option.
• Step 2. Select Reset Network Settings in the small window that pops up. Type your lock screen and Screen Time passcode to continue. At the pop-up prompt, select Reset Network Settings again. Your iPhone will reboot, then check if the cellular data function is working properly.
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Fix 6. Fix iPhone Could Not Activate Cellular Data Network in 1-ClickHOT

The inability to activate cellular data network occurs primarily due to internal iOS bugs and glitches, these system bugs and glitches can prevent the iPhone from functioning properly, resulting in the error of not being able to connect to a cellular data network, preventing you from surfing the Internet freely. In this case, you need a profession and safe iOS system repair tool, TunesKit iOS System Recovery.

It is a one-stop solution that fixes up to 150+ iOS bugs on iPhone/iPad/iPod touch in minutes. For instance, it can fix iPhone stuck on Home critical alerts, iPhone stuck on apple logo, and iPhone stuck on Emergency SOS mode, etc. And it can help you repair all kinds of iTunes errors for free.

Follow the step-by-step guide to fix could not activate cellular data network on iPhone using TunesKit iOS System Recovery.

Step 1Connect your iPhone to PC

Click on the Download button above to download and install this software on your Mac or Windows computer, then launch it. Connect your iPhone to your computer's USB port with a data cable. Select iOS System Repair in the main interface of the software.

On the next page, it lists the iOS issues that can be fixed, you can tap the Start button to proceed to the next step if your iOS issue is not listed.

Step 2Choose a mode to start

Both Standard Repair and Deep Repair are available for fixing iOS bugs. Standard Repair causes no data loss, and Deep Repair fixes more iOS issues but erases device data. You can choose Standard Repair to fix the issue first and then choose Deep Repair if it doesn't fix it.

Step 3Verify and download the firmware package

Confirm your iPhone model and iOS version. Then select the appropriate firmware package from the drop-down menu. Next, click the Download button to get the latest firmware package.

Step 4Start fixing

Once the firmware package download is complete, click the Start Standard Repair button. TunesKit iOS System Recovery will automatically start fixing your iOS system, after the repair is complete, check if the issue of could not activate cellular data network on iPhone pop-up still appears.

Fix 7. Update Carrier Settings

Your iPhone contains hidden settings, known as Carrier Settings, which dictate its interaction with your phone company's network. Outdated settings may lead to cellular data errors. So make sure your carrier settings is up-to-date.

• Step 1. Simply tap Settings app on your iPhone, then move to General > About.
• Step 2. If there are any available updates to the carrier settings, tap the Update button.
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Fix 8. Upgrade iOS To The Latest Version

Each new iOS version introduces bug fixes and enhancements. The latest update may have addressed the issues you're experiencing. Since you could not activate cellular data network on iPhone, you can connect to Wi-Fi to check for available updates. After completing the update, verify if the cellular network functions properly. To do so:

• Step 1. Navigate to the Settings app, tap on General > Software Update.
• Step 2. Your iPhone will automatically check for any available updates, and if available, click the Update Now button.
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Fix 9. Clear VPN Profiles

VPN (Virtual Private Network) settings can sometimes interfere with network connections. Therefore, turn off VPN on your iPhone and see if that fixes the issue of not being able to activate the cellular data network.

• Step 1. Navigate to Settings > General > VPN or VPN & Device Management.
• Step 2. Tap the VPN option, then turn off VPN toggle button if it's enabled.
• Step 3. Tap the information(i) button next to the VPN name.
• Step 4. Select Delete VPN to remove the profile.
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Fix 10. Contact Your Phone Company

If previous troubleshooting ways haven't resolved the issue, it's advisable to reach out to your phone company. The problem might not lie with your iPhone; it could be on the phone company's end, and they may be able to assist you further.

Final Word

The error "Could not activate cellular data network" on an iPhone is usually caused by weak signal, incorrect settings, SIM card issues, carrier problems, or software bugs, and it can often be fixed by the methods we've listed above. If these basic methods fail, system-level issues may be involved, and tools like TunesKit iOS System Recovery can help by repairing iOS glitches, fixing update-related bugs, and restoring normal functionality without data loss.