I dug out the manual that came with the modem and called the toll-free line for technical support.

我找出调制解调器的使用手册并打给其客服免费号码，寻求技术指导。

youdao

Does it support modem tethering via Bluetooth?

ENGADGET: We've got iPhones, what do you want to know?

The one thing that appears to be missing is support for cable modem connections, which to date still far outnumber DSL connections.

FORBES: Ten O'Clock Tech: Data Plumbing For The Home

Most phones that support Bluetooth can act like a modem and connect to an ISP.

FORBES: Magazine Article