A user equipment (10) is operable in a first mode in which the user equipment (10) is configured for communication with a first cellular network (30) and a second mode in which the user equipment (10) is configured for communication with a second cellular network (40). Mode switching between the modes is performed autonomously by the user equipment (10) or under the control of a cellular network node. The user equipment (10) has a first power consumption when operating in the first mode and a second power consumption when operating in the second mode, the second power consumption being different from the first power consumption.