Power management based on handover status

A device may include a controller and a modem of a first wireless network. The controller may determine that the modem is in active mode and the device is using a second wireless network for communication instead of the first wireless network. In response to the determining, the controller may switch the modem into power-save mode. In response to a handover triggering event, the controller may switch the modem to the active mode and acquire a service of the first wireless network without registering with the first wireless network. The controller may determine that a communication service is to be handed over to the service of the first wireless network. In response to determining that the communication service is to be handed over, the controller may perform registration with the first wireless network, and perform handover of the communication service to the service of the first wireless network.