After iOS 16.4 update; I have noticed that the auto switching between my dual SIM network does not work sometimes; I have to manually turn on flight mode and back in order to let the auto network search for the required cellular network connection. Not sure if it is a SIM module issue or software issues.
iPhone 14 Pro Max
To use two different carriers, your iPhone must be unlocked. Otherwise, both plans must be from the same carrier. If a CDMA carrier provides your first SIM, your second SIM won't support CDMA. Contact your carrier for more information.
If you have an enterprise or corporate cellular service plan, check with your company administrator to see if they support this feature.
Dual SIM network switching issue.
