Everything looks perfect in the screenshot
Try using sim on any other phone
Same thing you asked happened to me on Airtel4g
i have two fixes for this problem
you can try either of them
1.Leave the changes you made at...
Adobe lightroom and Snapseed
volte must be disabled or Volte might not be available in your location
If Airtel 4gVolte is not available what airtel does is it uses 3g/2g whenever...