AT&T Voicemail

[heart <3]

Hey there,
I'm new here.
I got the Nexus One couple of weeks ago, my carrier is AT&T.
I wanted to set up my voicemail box on the phone, but I wasn't able.
AT&T Tech Support was rude because it was not an AT&T phone they didn't even provide me with the number for the mailbox. After some "research" I found that the number is probably 1-206-321-6186. I tried to call that number to listen to my voice mails but I wasn't able.

Anyone having AT&T was able to successfully install their voice mail? How can I do it?

Thanks a lot

PS: prior of Nexus One I had an iPhone [i don't know if this information can be in any way useful]

[nav.jugi]

Put The SIM Card Back in Your iPhone and call Your mailbox from the iPhone make a note of the phone number You Phone Dial wen call mailbox with the AT&T iPhone that is set to do this job by factory settings next step put the SIM card back to the Nexus and set the number in You Nexus.