The "could not activate cellular data network" error means your iPhone won't be able to use the mobile data you're paying for ...

Make sure your iPhone isn't on Airplane Mode because it turns off cellular and Wi-Fi services. Restarting your iPhone can ...

Learn how to fix an iPhone stuck in SOS mode and restore your cellular connection quickly.

To fix common iOS 26 issues like battery drain, lag, heating, crashes, or connectivity problems, update to the latest version, disable unused features like Apple Intelligence, Liquid Glass, 3D ...