No Service issue while using dual SIM on my iPhone
[Re-Titled by Moderator]
Question marked as
Disable VPN and try again.
To use two different providers, your iPhone must be unlocked. Otherwise, both plans must be from the same provider. If a CDMA network provides your first SIM, your second SIM won't support CDMA. Contact your network provider for more information.
If you have an enterprise or corporate data service plan, check with your company administrator to see if they support this feature.