You plug it into your Windows laptop: “Device descriptor failed.” You plug it into your Raspberry Pi: Crickets. You plug it into your OpenWRT router: Nothing.
When you first plug it in, the chipset lies to your OS. It says, “Hello, I am a virtual CD-ROM drive containing Windows drivers.” Your computer obediently mounts it, and your modem disappears. zte mf833u1 driver
Poof. The CD drive vanishes. The modem reboots internally as a proper Network Interface Card (NIC). Windows will now see it as "ZTE NCM" or "Mobile Broadband." You plug it into your Windows laptop: “Device
The Ghost in the Machine: Taming the ZTE MF833U1 Driver on Linux (and Windows) It says, “Hello, I am a virtual CD-ROM
Today, we’re going to exorcise the ghosts and force the to do its job. The "Eject" Trick (Most People Miss This) Here is the dirty secret of the MF833U1: It uses "ZeroCD" (Zero Carrier Detection).
Linux hates ZeroCD. You need usb_modeswitch .