Why isn't my sim registering to my network after installing 4.1.2 Android claro software kindly help?

[AC Question]

my sim not getting registered to network after installing 4.1.2 android claro software kindly help

at first i was using cyanogen mod in samsung note 2 but it had some bugs so changed to claro now,but my sim is not getting registered on network, but my sim is working fine in other phones. cant recieve or do any calls or msgs plz help to solve tys issue