If you’re on a limited mobile data plan, you may find opening your bill to be harrowing experience. Is there an overage charge? How much? And why was there so much data used? While the charges are concrete, the reasons are often harder to understand.You’re not powerless, however. With the right apps, and a change of habits, you can make overage charges a thing of the past.Here’s how to reduce data usage and defeat the mobile bill boogyman.Use WiFi At HomeAlmost every smartphone or tablet that’s capable of cellular data also includes a Wi-Fi radio. You can use this to connect to a home wireless network just as you would connect a laptop or desktop PC, and once connected, cellular data won’t be used.Both Android and iOS users can connect to a wireless network by opening the Settings menu, switching Wi-Fi on and then tapping the Wi-Fi entry to open a list of available networks. Just enter your home network’s security key and you’re done.Users on iOS can further refine usage by going to Settings -> General -> Cellular. Scroll to the bottom of that menu and you’ll see the option to turn cellular data on or off for various services. Turning them all off will reduce data usage.You can also use Wi-Fi outside your home, though security concerns do apply.Use A Data Monitor To Keep An Eye On UsageAndroid added a built-in data monitor into Android 4.0. It can be accessed through Settings -> Data Usage and will show you how data has been used per-app and overa
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