The iPhone needs to be connected 24/7, and Apple built various features into iOS that want to take advantage of that connection.
The problem is that using these features can seriously impact your cellular data plan. This means you either end up paying extra or get kicked to the lower tier by your provider.
Now let’s take a look at the iOS 16 settings. This is the setting most likely to punch a hole in your data plan.
You can pay for what you need, and it’s convenient, but many of these services can wait until you connect to Wi-Fi.
Also, keep in mind that your provider may limit the amount of high-speed bandwidth available to you, even if you’re on an unlimited plan.
If you have a fully unlimited plan, leave all of this alone and don’t worry about the consequences.
https://www.zdnet.com/article/the-4-ios-16-settings-you-need-to-turn-off-now-to-save-your-data/#ftag=RSSbaffb68 4 iOS 16 Settings You Should Turn Off Now to Save Your Data