One possible reason why your data is not working after an iOS update could be due to a misconfiguration or compatibility issue between the update and your network settings. Here are some steps you can take to troubleshoot and resolve the issue:
1. Restart your device: Begin by restarting your iPhone after the iOS update. This simple step can sometimes resolve temporary glitches and refresh the network settings.
2. Check cellular data settings: Ensure that you haven't accidentally disabled cellular data or turned on airplane mode. To check this, go to Settings > Cellular or Mobile Data and make sure the toggle switch is turned on for Cellular Data.
3. Reset network settings: Resetting your network settings can often fix connectivity issues. However, keep in mind that doing this will remove any saved Wi-Fi networks and passwords. To reset your network settings, go to Settings > General > Reset > Reset Network Settings.
4. Update carrier settings: The iOS update may require updated carrier settings to work properly. Make sure that you have the latest carrier settings installed by going to Settings > General > About. If an update is available, you will be prompted to install it.
5. Manually select your network: Sometimes, the iPhone fails to automatically connect to the correct network after an update. To manually select your network, go to Settings > Cellular or Mobile Data > Carrier Services. Disable the Automatic option and choose your network provider from the list.
6. Contact your carrier: If none of the above steps work, it's possible that the issue lies with your network provider. Reach out to your carrier's customer support and explain the problem. They can check for network outages or provide further assistance specific to your network settings.
Remember to also consult Apple's official support website or check for any specific iOS update-related issues that have been reported. Technical glitches are not uncommon during software updates, and following these steps can often help resolve connectivity problems after an iOS update.