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

Your cell phone may work abroad, but don't assume it's free. Those roaming charges can shock you with bills far exceeding expectations. To lower your costs, travel expert Rick Steves, on his website ...

CHICAGO -- You could be wasting money and smartphone data without even knowing it. There are several ways to save data and it's as easy as adjusting the settings on your smartphone. Many carriers are ...

The latest version of the iOS 9 beta has brought some goodies, among them the new Wi-Fi Assist feature, which will recognize bad Wi-Fi connections, and use cellular ...