There are so many reasons why users need to control their 3G data usage, such as to save battery power and of course to make sure they don’t cross their monthly data limit. Especially, with the launch of iCloud, there is an increased possibility that users may overshoot their data usage limit as they place files in the cloud to access them from all their devices.
To optimise their data usage, users need to go to the Settings app, and tap iCloud to pick what they want to keep in the device and what they want to send to the iCloud. This way, only necessary apps and files go to the cloud and rest stay on the same device.
Those who visit the App stores more often download apps and music regularly thus eating into the 3G data limits. To turn the option off, users need to go to Settings, tap Store and switch the category of downloads which users want to turn off.
Even email, if refreshed regularly, can eat up a lot of data especially if the users are viewing HTML newsletters and attachments. If the users select the option of manually fetching the data every time, they are likely to manually fetch the data every time they need to check their mail.
Last, but not the least, is the option of going to Settings app, switch Cellular Data off in the Network option of General section. If the users exercise this method, they are opting only WiFi to send and receive data though the users can always turn it back on whenever they need to.