3G-modem for Linux supporting USB 3.0

Question

I've laptop with three USB3.0-ports.OS is Linux Mint 13 (yeah, it's Ubuntu-based). My modem Huawei E1552/E1800 could work in two modes:

1) as flash with drivers

2) modem

The device is operating as modem and seen in Network Manager if only it's attached before OS loading. If after, it's detected as flash. The all mine attempts and games with usb_modeswitch are in vain and wasn't came to good.

So I would like to ask if there are such modems' model (it's not important what the manufucturer is):

1) that has single operating mode (modem)

or

2) if it supports 2 modes, I'll be able to swich device into the mode without much hassle.

Answer 1

I've managed to make device detectable as modem by force switching it into "only modem" mode:

• find the appropriate modem TTY

  ls /dev/ttyUSB* (usually ttyUSB0)

• connect minicom to modem

  minicom -D /dev/ttyUSB0

• send command

  AT^U2DIAG=0 (only modem mode)

• unplug and plug modem again,
• you can see your mobile wireless connection in Network Manager

Other AT-commands:

1. AT^U2DIAG=1 (modem + CD-ROM)
2. AT^U2DIAG=6 (only network card mode)
3. AT^U2DIAG=268 для E1750 (network card + CD-ROM + Card Reader)
4. AT^U2DIAG=276 для E1750 (network card + CD-ROM + Card Reader)
5. AT^U2DIAG=256 (modem + Card Reader)