After some hours of trying I now have a working connection with my Dutch T-Mobile Web 'n' Walk account. The default software and instructions did not work, the Launch2Net for Mac - T-Mobile Edition does not work as is, but there is a trick available to make it work.
- Put the SIM that your received with your Web'n'Walk account in a mobile phone, make it not ask for a PIN. On my Nokia this function can be found under Security Settings - PIN code request: off.
- Download and install Launch2Net for Mac - T-Mobile Edition.
Disable the NML2NDeviceObserver in System Preferences - Accounts - Login Items for your account. This prevents the Launch2net program to be started when you insert your Express Card into your MacBook Pro. N.B. Use the minus sign to remove that specific item, not the check-box.
Now go to System Preferences - Network. You will find a new "GlobeTrotter HSDPA Modem. Use the Account Name: tmobile, Password: tmobile. Hit Advanced, Vendor: Option, Model: GSM, APN: internet, CID: 1.
- Hit connect and you should be connecting with your Option Express Card modem that came with your T-Mobile mobile internet account.
Some difficulties I found;
- The SIM needs to be in all the way, not partially. Yes, it sounds stupid but I did not insert the SIM far enough.
- The Launch2Net from nova media did work, but costs € 75,-.
- The speed varies from moment to moment; It can go up to 50 kilobytes per second to download something, but 10 seconds later it only does 3 kbps.
- With this work-around you can't check the reception quality.