i am not seeing this option.can you provide a screenshot
I am also facing same issue.using airtel 4g sim
they recalled the update
for me also this issue is coming .Also i am not getting network even if all the phones around me have the network.
additionally my sim in slot 1...
Is this update freezed...i am yet to receive this update on my one plus 3 even after 2 weeks from its official rolling out.