Bluetooth cellular date usage in System Services
Bluetooth Services is the largest category of cellular data usage within System Services on my iPhone 7. (The phone is running iOS 15.4.1.) Why does Bluetooth use cellular data?
User profile for user:
JessS19
User level:
Community Specialist
Greetings, fcwolf.
Please Restart your iPhone and check your cellular usage again: Use cellular data on your iPhone or iPad
If you are still noticing an unusually high amount of cellar data being used, Contact Apple Support for guidance.
We hope this helps!
Sincerely.