If you haven't got an unlimited plan on your phone, you'll need to keep an eye on your mobile data use each month. You don't want to run out right when you need it the most or get hit with extra ...

Switching your mobile data off and on only when you want to use the internet is definitely not enough.

Thankfully it’s fairly easy to monitor your mobile data use with iOS, Windows Phone 8 and Android, so you can keep from hitting those limits before your month is up.