Anyone using diamondcard.us here?

I can't set it's SIP account up on the N900, it doesn't sign in.

Here's how I filled out the SIP account properties:

User name: XXXXXX
Password: ***********
=========
Advanced settings
Use for telephone numbers: checked
User name: sip:XXXXXX@sip.diamondcard.us
Transport: UDP
Outbound proxy: left empty
Port: 5060
Discover public address: checked
Loose routing: checked
Keep-alive mechanism: Auto
Keep-alive period: Auto
Auto-detect STUN: checked

Any thoughts, anybody got it working?

That might be the problem. From my (patchy) understanding of SIP using it without a proxy tends to assume that your device can accept incoming tcp connections, which isn't going to be possible on most of the networks an N900 is likely to find itself on.

Yep, that was it, thank you.

I was able to set it up and it works. To be able to use diamondcard.us on Nokia N900 GNU mobile phone: http://sumoudou.org/0/7.html

The top part, or the login box before you tap Advance

User name: XXXXXX
Password: ***********


Username should be XXXXXX@sip.diamondcard.us

That should work, label is wrong, bug logged and fixed for next future update..