Method for reducing battery power consumption of user equipment (UE) during manual CSG selection

A user equipment (UE) for connecting to a registered public land mobile network (RPLMN), the UE comprising:

• at least one processor;
• and
• a memory configured to store a computer program code therein,
• wherein the at least one processor, upon execution of the computer program code, is configured to:
• initiate a manual closed subscriber group (CSG) selection,
• identify a closed subscriber group (CSG) which is selected by a user,
• store a duplicate value of the RPLMN in use before the initiating, when the CSG is in a public land mobile network (PLMN) which is different from the RPLMN,
• transmit a request message to the PLMN for registering on the CSG cell in the PLMN, and
• receive an accept message including information indicating limited service from the PLMN in responding to the request message, the information including a value related to at least one cause of the limited service, and
• wherein the at least one cause of the limited service includes at least one of ‘SMS only’ and ‘circuit switched (CS) fallback not preferred’.