Bought the Swisscom Unlimited PC Card (Option Globetrotter COMBO EDGE) package. Additionally the latest version of Mobile High Speed for Mac OS from nova media. Installation is nice and easy - see screenshot of config windows. What came next wasn't amusing.

There are two issues I can't yet figure out why they are happening:

1. I can only open the connection with "Internet Connect" when I previously have initialised the card by opening the Mobile High Speed application (without clicking on Activation) and then closing. If I don't do that - the card does not respond to the AT+CGDCONT command and run into a time-out later in the connect script. Bad - but I have a workaround.
2. After the connection is open - the card stop responding after some traffic (unknown of the size) is sent in and out. The red light on the card suddenly stop blinking. That sometimes cause the PowerBook to hang (hard reboot needed to recover). If I don't produce any traffic - the line remains open (card blinking) without a problem. Very strange. I opened a support ticket at nova media - see if they know how to solve that.

Did an update to the latest firmware to check if that helps - nope. Note that the update of firmware is only possible on Windows (using the Swisscom tools) and you need to remove the SIM card before update! (firmware update will fail with SIM card inserted - and they don't tell you that - until you call support)

Additional small issues:

1. The nova media software tells me that the card can do EDGE with max 160kbps - the Swisscom package tells me up to 236.8 Kbit/s - what's true?
   
2. When connecting and transmitting data - the card produces static noise in the speakers (workaround - mute speakers)