[Resolved]  Airtel — SIM ERROR

Hello .. My Number is [protected].. I am working in a Private Concern and the Number I am using is the CUG provided by the Company.. I used this number in Samsung galaxy Note 3 and then I changed the Mobile to Galaxy Note 4.. At present I am having an issue that
the Sim is not working in Galaxy note 4 but it works fine in Galaxy Note 3.. My Note 4 Mobile is supporting every other numbers except the Number I am officially using.. Please give your suggestions..

Note; The CUG Number will work only if the Roaming is active

When I use sim giving msg error in application

Showing error in application in every 30 second

Hello sir my aitel sim is error my airtel nambar is [protected] mera sim 3 days se band hai reng nahi dikha raha hai please mera sim chalu krdo

My Airtel sim nambar is [protected] mera sim band hai chalu karado