Airtel 5G connectivity
Hi Team, Not able to get 5G connectivity in iPhone 12 as it saying device team need to release the supported version of software.
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There is no software Apple needs to release; check with your cellular carrier to see what their current support level is.
Use 5G with your iPhone - Apple Support
You may also want to check it is on the list of supported 5G carriers in your area; if you are not in the US or Canada you can select other regions at the link:
Wireless carrier support and features for iPhone in the United States and Canada - Apple Support