Here's why I re-marked it not quite solved. It's true that I can get online now using PCLOS, but it is a very involved business. What I have to do is:
Run Sakis3g script, but not the default "Connect 3g" option, as it can't connect. I have to set up the modem using Sakis3g, then close Sakis3g, open UMTSmon and connect using that. Al of this makes it impossible for the other half to connect to the 'net - too many steps needed.
The reason I have to go through all of the above each time is:
Sakis3g knows that the USB modem is on Optus, and supplies two profiles only. One uses the APN "internet", the other "CONNECT". However, Optus' new APN is "preconnect", and I am unable to edit either of the above options. I do have the option of choosing "Use custom APN", but this prompts me first for a APN, which is fine, I enter "preconnect", but then for a username and then a password. Using "pass" in both of those doesn't work, and Sakis3g won't let me leave them blank, which I would otherwise do, as I don't need a username or password. Does anyone know how to edit the default Sakis3g profiles?
I can't just use UMTSmon to connect, as unless Sakis3g sets up the modem, UMTSmon aborts without starting as it cannot detect a modem. However, if I run Sakis3g first to only set up the modem, then UMTSmon will connect as it allows me to establish a profile that uses the APN "preconnect" while leaving the username and password blank.
Trying to connect using the CC doesn't work at all. It also can't detect the modem unless it's first set up using Sakis3g. Then, if I do set the modem up first with Sakis3g, when I try to connect, CC says that the SIM card is not installed!
A possibly related complaint is that internet speed on PCLOS is much slower than in Windows. In Windows I get a download speed of >40 kbps, whereas is PCLOS the best I get is <6 kbps. This doesn't have anything to do with internet traffic, as I have checked this by just rebooting and immediately connecting in Windows.
Does this have anything to do with the USB device being HSPA compatible? The enclosed paperwork said that it will try first to connect to HSPA (3G), then UMTS (3G), then GPRS (2G). Is Windows using HSPA and PCLOS something else? Would it be faster if I could connect using Sakis3g?
Thanks for persevering so far in reading all of this. Any help would be appreciated.