Mobile data is one of the most important parts of any plan. However, keeping it running the whole time can have some unwanted consequences.
Firstly, it will eat into your allowance. This is because some apps will be constantly connecting to the internet even if they aren’t open. Depending on your settings, some can even download updates from the cellular network without you knowing.
You should be able to change the settings of each app to prevent this from happening, with some mobile phones allowing you to turn off background data to stop it from happening entirely.
As well as diminishing your data, leaving your phone connected at all times will also drain your battery. So, if you're in a situation where your phone's power is dwindling, turning off your mobile data will help preserve it.
Getting into the habit of logging your phone off will also help keep your battery in good nick. If you're constantly charging it, it will start to lose capacity over time, which is a pain.