GlobeSurfer iCon 7.2
The iCon 7.2 was sold in two variants. The original version uses the option.ko or usbserial.ko driver but could be upgraded with firmware to make it the same as the second variant which uses the hso.ko driver. The second variant will operate at up to 7.2 Mbps.
Inside the Icon 7.2 is a GTM 378 module. Diagnostics software interrogating the Icon for a serial number may therefore find the serial number begins with SE and not ZL as printed on the label.
Even if the device is upgraded there is a problem with option.ko - it grabs the Icon 7.2 before the hso.ko driver sees it. From the ozerocdoff README here is the solution:
Solution use the correct HSO Option driver:
Because we have now two drivers for some Option WWAN-modems, we simply blacklist the mainstream 'option' kernel module driver, which we do not like to use. Note that this 'option' driver does support only Option WWAN modem with Version 3 Interface, which support only virtual serial modem ports. The new 'hso' driver supports the newer Version 4 Interface. Here also an IP network device is available, which allow high speed communication also by using the slow USB 1.1 bus system. Note also that this network interface is not identical to a virtual ethernet, because it "speaks" only IP. So e.g. running a dhcpclient is here not possible, because this would require the support of the simple ether transport package frames.
The 'option' mainstream driver can be prevent to be automatically loaded be adding a line like:
in the blacklist file found here:
But note that this will not unload a currently running 'option' driver. This has to be done by the commands:
lsmod | grep option
The 2nd grep to the option kernel module should not find a 'option' driver still loader. Otherwise the driver maybe currently in usage and the 'option' driver can not be successfully unloaded. Then please unplug your WWAN modem and repeat the procedure.