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

Upgrading your phone? Here’s the safest way to transfer data on iPhone and Android without risky apps or tech stress.

For the last couple of weeks, every time I try to browse the web on my iPhone 3GS over the cell connection nothing happens at all. For example, right now it's showing three bars and a 3G connection, ...