My iPhone is not connecting outside where there is no wifi

Contact your carrier for help with their service.

If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support

If you did not have access to WiFi Internet service, and what stops working are things that rely on access to the Internet, check to see that

• Your cell phone plan includes cellular data
• You have cellular data turned ON and Airplane Mode turned OFF
• You have not prohibited a particular app (that you want to work with cellular data) from using it