USB tool for switching CDMA / UMTS modem, from cdrom mode to MODEM mode (correct version),USB tool for switching CDMA/UMTS modem, from cdrom mode to MODEM mode (correct version)

HUAWEI UMTS Datacard/Modem AT 命令手册-HUAWEI UMTS Datacard/Modem AT Command Interface Specification

OpenBTS-UMTS is a Linux-based application that uses a software radio to present a UMTS network to any standard 3G UMTS handset or modem. It builds upon the OpenBTS framework, where the MS or UE is treated as an IP endpoint at the edge of the network.