Both Android and iPhone devices let you check data usage and which apps are the worst offenders so it's worth checking to see what's been chewing through your allowance as it could save you buying ...

Data can cost you big bucks if you're not paying attention. This article explains how to check data usage directly from an iPhone or Android phone or through a major carrier, such as AT&T, Verizon ...

This feature is known as tethering. When you use Personal Hotspot, your iPhone acts like a wireless router for the other devices, transmitting and receiving data for these devices.

But all that data usage is not evenly spread across AT&T's wireless customer base, De la Vega says--far from it. He cited AT&T research showing that just 3 percent of AT&T's smartphone customers ...

I have an AT&T iPhone 4 with the 200 MB/month data plan. Last month, I somehow managed to exceed my monthly cap by 7 MB, even though the myAT&T app showed that I had used 180 MB with 5 days left ...

Mere hours after trumpeting the 12% bump in Verizon data usage, the firm that supplied the data adjusted the number downward, to AT&T’s favor. As of this update, it’s at 9.4% and holding.