Hey
I am in the Northcliffe/Emmarentia area in Johannesburg and I also experience these disconnection problems, like a recurring nightmare. I keep trying different things and hope each of them work, until it fails. I am bitterly disappointed at the moment.
It seems the dongle disconnects from the USB port. The Cell C program says "connecting to device" (or something similar) after a few seconds of lost transmission. I also notice that connecting via EDGE does not cause the same problem (not as far as I've noticed), but that's getting back in the donkey cart after driving a Porsche!
I've read through forums and tried the following:
1. Update the driver to allow WCDMA-only mode (v4.20 instead of v4.17 I believe, not that I can find those numbers anywhere). It forces WCDMA, yes, but doesn't solve my disconnection problem. Most of the time I run EDGE-only mode, straw hat and all behind the donkey's rear, for consistency in on-line game play. Fail.
2. Checked some setting called ECN, this should be disables and is. Fail.
3. A forum suggested the disconnects might be due to insufficient power to the modem. I bought a powered USB hub today and it worked for a while (leading me to discover the irritating fact that depending on your download rate/volume Cell C switches you between WCDMA and HSPA+, this is a Nightmare in on-line gaming!). The disconnects, however were destined to continue. I have noticed that the modem light changes to dark blue (WCDMA, I believe) and does not disconnect (as far as I've noticed), but as soon as it turns Teal or light blue (HSPA+, I believe) the problems start. Fail.
4. Another suggested downloading KB..something, a hotfix update to windows. The hotfix was not required by my PC as Windows cared to inform me when I tried to install it. Fail.
I'm running out of ideas.
Signal strength is -89dBm, whatever that helps, it doesn't seem to be a signal strength problem following from the threads above. I hope I'm not just adding my voice to the masses and that Cell C fixes this. Whether it be related to new USB drivers (I'm on Windows 7 64-bit, can someone confirm the problem on a different OS version?), the towers (this was the excuse of an in-store rep beginning of December) or whatever the issue may be. Cell C please note this problem is NOT [SOLVED].
Driving at 500KM per hour is no use with an engine cutting out all the time. Right now I ain't "whooosh"-ing anywhere.