5g option greyed out after ios16.4 update
I recently updated to iOS 16.4 and 5g option greyed out in voice & date option. And showing messge like your sim doesn’t support 5g
iPhone 13, iOS 16
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First, see if there is a carrier settings update by going to Settings/General/About. If there is one you will be prompted to install it, then restart your phone.
If that doesn’t fix it contact your carrier.