An electronic device comprising: a communication processor including: a first communication circuitry (212, 520, 2420) configured to support a first cellular communication network, and a second communication circuitry (214, 530, 2430) configured to support a second cellular communication network, a temperature sensor (176, 2440) configured to sense a temperature of at least part of the electronic device; and an application processor configured to: receive information related to the temperature sensed by the temperature sensor and information related to data transmission, and determine (1221, 2820, 2920) whether to request the communication processor to change from a first mode to a second mode based on the information related to the sensed temperature and the information related to data transmission, wherein the communication processor is configured to: receive (2830, 2930) a signal indicating to change from the first mode to the second mode from the application processor, wherein, while the communication processor is in the first mode, the first communication circuitry and the second communication circuitry are respectively connected to the first cellular communication network and the second cellular communication network, the electronic device is characterised in that in response to changing (1312, 1212, 1222, 1322) to the second mode, perform (1224, 1323, 2735, 2960), at least one operation for releasing the connection between the electronic device and a base station supporting the second cellular communication network, and in the second mode, maintain the release of the connection with the second cellular network by not transmitting a measurement report to the first cellular communication network, related to the second cellular communication network.. a communication processor including: a first communication circuitry (212, 520, 2420) configured to support a first cellular communication network, and a second communication circuitry (214, 530, 2430) configured to support a second cellular communication network, a first communication circuitry (212, 520, 2420) configured to support a first cellular communication network, and a second communication circuitry (214, 530, 2430) configured to support a second cellular communication network, a temperature sensor (176, 2440) configured to sense a temperature of at least part of the electronic device; and an application processor configured to: receive information related to the temperature sensed by the temperature sensor and information related to data transmission, and determine (1221, 2820, 2920) whether to request the communication processor to change from a first mode to a second mode based on the information related to the sensed temperature and the information related to data transmission, receive information related to the temperature sensed by the temperature sensor and information related to data transmission, and determine (1221, 2820, 2920) whether to request the communication processor to change from a first mode to a second mode based on the information related to the sensed temperature and the information related to data transmission, wherein the communication processor is configured to: receive (2830, 2930) a signal indicating to change from the first mode to the second mode from the application processor, wherein, while the communication processor is in the first mode, the first communication circuitry and the second communication circuitry are respectively connected to the first cellular communication network and the second cellular communication network, the electronic device is characterised in that in response to changing (1312, 1212, 1222, 1322) to the second mode, perform (1224, 1323, 2735, 2960), at least one operation for releasing the connection between the electronic device and a base station supporting the second cellular communication network, and in the second mode, maintain the release of the connection with the second cellular network by not transmitting a measurement report to the first cellular communication network, related to the second cellular communication network.. receive (2830, 2930) a signal indicating to change from the first mode to the second mode from the application processor, wherein, while the communication processor is in the first mode, the first communication circuitry and the second communication circuitry are respectively connected to the first cellular communication network and the second cellular communication network, the electronic device is characterised in that in response to changing (1312, 1212, 1222, 1322) to the second mode, perform (1224, 1323, 2735, 2960), at least one operation for releasing the connection between the electronic device and a base station supporting the second cellular communication network, and in the second mode, maintain the release of the connection with the second cellular network by not transmitting a measurement report to the first cellular communication network, related to the second cellular communication network..