A method performed by a UE comprising a plurality of subscriber identity modules (SIMs) is provided. The method includes registering a first SIM from the plurality of SIMs with a first network entity, transmitting, to the first network entity, a request message to obtain a time gap configuration when the UE is registered and connected with the first network entity through the first SIM, receiving, from the first network entity, a response message including the time gap configuration, and activating the time gap configuration in case that the UE is connected to the first network entity.