Wireless
Let’s say you stream a lot of videos or music using the Safari app. You can turn off the ability to use Safari with data in the Settings app.
Why this works:
Streaming music and videos using apps such as Spotify, YouTube, or Netflix can be the biggest drains on your iPhone’s data. If you want to seriously cut back on how much data you use on your iPhone, only stream music and videos when you’re connected to Wi-Fi.
Pro tip: