10 years ago
  Huawei (GSM/3G/HSPA)
  Mint (older version)
  Works perfectly
What works:

The Internet connection.

What doesn't work:

Using it with the Orange service in Romania, the default DNS server has problems to connect sometimes to some specific sites (even google; yahoo connects flawlessly). This doesn't seem to happen when using it's default (proprietary) connection manager under Windows (the Vista version under compatibility mode for Win 7). This was an upstream issue also in Helena and Isadora.

What was done to make it work:

Changed blank username and password to from blank to some characters (possibly superfluous).
Changed, under the IPv4 tab, the Method to "Automatic (PPP) adresses only", and the DNS server to (google)
Pin code was disabled during a Ms. Windows session, using its provided software.
Installed the usb-modeswitch and usb-modeswitch-data packages (just to be safe from problems, but seemed to be detected even without them).

Additional notes:

Haven't tested the integrated card reader.