The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Embodiments herein provide a method and an apparatus for managing a non-integrity protected message. The method includes receiving a reject cause message from a first public land mobile network (PLMN) in response to a transmission of a registration request message to the first PLMN, re-attempting the transmission of the registration request message to one of the first PLMN and a second PLMN, receiving registration accept message from one of the first PLMN and the second PLMN in response to the re-attempting, and resetting a counter maintained for the first PLMN by the UE.