The USB interface of an Android device is pretty complex ... with your device with ADB while configuring the internal modem ...

A modem that plugs into the USB port of a computer. The term states only that the connection to the computer is via USB but does not imply which network service is supported. It often refers to a ...

You have to have a Qualcomm-based device, it has to either run rooted Android or be a USB modem, but once you find one in your drawers, you can get a steady stream of packets straight into your ...

Typically available as an external USB module, for desktop computers, the modem may also be available on a PCI or PCI Express (PCIe) card that plugs into an empty slot on the motherboard.