Try toggling Airplane Mode on and the off again and see if it helps.
If not try Settings-General-Reset and reset all settings.
After that a forced restart for your model.
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
Want to highlight a helpful answer? Upvote!
Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >
Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >
Newsroom Update
Apple is introducing a new Apple Watch Pride Edition Braided Solo Loop, matching watch face, and dynamic iOS and iPadOS wallpapers as a way to champion global movements to protect and advance equality for LGBTQ+ communities. Learn more >
Apple is introducing a new Apple Watch Pride Edition Braided Solo Loop, matching watch face, and dynamic iOS and iPadOS wallpapers as a way to champion global movements to protect and advance equality for LGBTQ+ communities. Learn more >
Try toggling Airplane Mode on and the off again and see if it helps.
If not try Settings-General-Reset and reset all settings.
After that a forced restart for your model.
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
If you have restrictions enabled, check:
Settings>General>Restrictions>scroll down to Cellular Data... and allow
Regards
Giulio
Data turning off when exiting settings