Anyone use the switch off "background data"

I'm going from an unlimited data contract to a limited one, so willbhave to watch my data now more than I used to.

So does anyone use "background data" option on iPhones? I think it's meant to "speed up" the refresh of data so when you open an app, weather for example, the data is current - is this correct?

So what else does it use it for, good examples? Do people keep it enabled or not? Imagine it uses battery and data when maybe not needed.

Thanks

 

Anyone use our switch off "background data"

Ah didn't think of that! I've switched it off totally, rather than per app at moment but I do use my iPhone for Sat nav so it may limit this?

Actually just checked the sat nav I use isn't listed in the background app list anyway?? It's CoPilot