If cellular data is not working properly on your iPhone, you can find below the steps to fix the problem and improve cellular data connectivity on your iPhone.
iPhone Cellular Data Not Working
If you are outside the range of WiFi network, you won’t be able to connected to internet, unless you are subscribed to a cellular data service and Cellular Data is working on your iPhone.
Hence, the problem of cellular data not working on iPhone or the issue of iPhone constantly disconnecting from cellular network can be frustrating.
In most cases, the problem of cellular data not working on iPhone is related to network connectivity issues and carrier supported features like WiFi calling and WiFi assist.
1. Area Not Covered by Service Provider
If your iPhone is coming up with “Network Not Available” error message while driving/travelling, the problem might be due to your service providers network not being available in that area.
Hence, the only way to fix this problem would be to move to an area that comes under the coverage area of your service provider’s network.
2. Poor Network Connectivity
Take a look at top-left corner of the screen and make sure that your iPhone is indicating a good network strength.
If the reception is poor, move to another place and see if the reception improves. If not, you will have to wait for the reception to improve.
3. Enable/Disable Cellular Data
Disabling and enabling cellular data is known to fix data connectivity issues.
Go to Settings > Cellular > Move the toggle next to Cellular Data to OFF position.
After 10 seconds > Enable Cellular Data by moving the toggle to ON position.
4. Enable/Disable Airplane Mode
Enabling and disabling Airplane Mode helps in refreshing cellular network and resets the wireless antennas on your device.
Go to Settings > Enable Airplane Mode by moving the toggle to ON position.
Wait for 10 seconds and Disable Airplane Mode by moving the toggle to OFF position.
5. Disable VPN
If you are using a VPN service, disable the VPN service on your iPhone and see if this helps in connecting to cellular network.
Go to Settings > General > VPN & Device Management > VPN > move the toggle next to Status to OFF position.
After disabling VPN, see if you can access the internet on your iPhone using cellular network.
6. Switch OFF WiFi Calling on iPhone
The problem might be due to iPhone automatically switching from cellular to WiFi network due to WiFi calling feature being enabled on your device.
Go to Settings > Phone > WiFi Calling and moving the toggle next to WiFi Calling to OFF Position.
If you are on a limited data plan, you might be interested in taking a look at this guide: How to Reduce Cellular Data Usage on iPhone.
7. Turn OFF Wi-Fi Assist
WiFi assist is another feature that can make iPhone automatically switch from cellular to WiFi network.
Go to Settings > Cellular > disable Wi-Fi Assist by moving the toggle to OFF position.
After disabling WiFi assist, you should find your device maintaining its connection to cellular network.
8. Make Sure Cellular Data is Not Restricted
It is possible that you had restricted access to cellular data on your device and forgotten about it.
Go to Settings > Screen Time > Content & Privacy Restrictions > Cellular Data Changes > select the Allow option.
Note: You may be prompted to enter your screen time password.
9. Remove SIM Card and Put Back Again
Removing and reinserting SIM card helps in refreshing the network by reconnecting iPhone to the carrier’s network.
Remove the SIM Card from your iPhone > wait for 15 seconds and reinsert the SIM card back on your device.
10. Install Carrier Updates
If the problem is still not fixed, try to install carrier updates on your iPhone by connecting your device to an available WiFi network.
Go to Settings > General > About >Network.
On the next screen, tap on the Update option to install carrier updates (if available).