Problem is, using these features can put a serious dent in your cellular data plan, which either means that you end up paying extra fees or being kicked to a lower-speed tier by your provider. Also: iOS 16: How to get the most out of your iPhone’s new lock screen OK, let’s take a tour of the settings in iOS 16 that are the ones most likely to burn a hole in your data plan. I don’t mind paying for something that I need and that’s useful, but many of these services can wait until I’m on Wi-Fi. And bear in mind that even if you have an unlimited plan, your provider may still limit how much high-speed bandwidth you have available. If you have a totally unlimited plan, then you can leave all these on and not worry about any consequences. Go to Settings > [tap on your name at the top] > iCloud > iCloud Backup and tap the Back Up Over Cellular toggle. Go to Settings > Photos > Cellular Data. Here you have two settings:

Cellular Data: Uses a proportion of your allowanceUnlimited Updates: Full upload and download, which Apple warns “may cause you to exceed your cellular data plan.”

Personally, I have both turned off because it’s a heavy user of both data and battery. Go to Settings > App Store and tap the Cellular Data toggle. Go to Settings > TV and tap the Use Cellular Data toggle. If on, under Cellular you have two options:

High Quality: Uses the most dataAutomatic: Uses an optimized stream which uses less data