Cellular data not responding
How to open cellular data
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"Cellular data not responding: How to open cellular data"
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Troubleshooting Cellular Data Not Responding:
A. Where is it not opening? If in Settings, why does the message say?
B. "No Service":
Is "No Service" shown on the top-left corner of your screen? If so, go here to fix that: If you See No Service or Searching on your iPhone or iPad - Apple Support
C. Contact your Carrier:
Having issues with Cellular, contact your Carrier, asking them to configure this to the correct settings. They configure all of this in the SIM card.