I had been quite happy with the Slingshot service after I switched from other ISP a few months ago until last week I could not use calling card to make toll calls. I could use the same phone card in office and other places, even tried in a friend's house with the same Slingshot plan as mine with all worked fine, so could rule out the problem with the calling card itself.

The first time I called Slingshot for technical support after about 20 minutes' wait I was told their system didn't support the use of calling card, probably the # key was not supported. When I told the guy I had no problem until this week and he said it had been a miracle it worked so long for you. By the way the calling card could be used without the # key(just need to wait for the timeout after PIN input) so it's not the problem with the # key detection in their phone system.

The second day I called again and this time I was told they were aware of the problem with the calling card but there's no estimated time for the fix.

Anyone with similar issue?