A chamber member is mounted to a bottle body and has an opening and partially bounds a first chamber and a second chamber. More specifically, one embodiment of a method includes entering a standby mode, wherein in the standby mode, at least one component of a communications device is shutdown, and wherein in the standby mode, at least one channel is scanned to determine potential interference and monitoring exchanged traffic with the communications device. In the disclosure, when used for switching a CS domain service to a PS network, the HO-Proxy can preserve accurately the PS bearer resource for a corresponding service of the UE, thereby implementing accurate and timely handover.