Busy signal in place of voicemail and lost calls

[deeplyunhip]

I recently got a new phone, a Samsung a237, though I am using the same Att&t phone # I used with my old phone.

The voicemail on my phone does not work, even though when I got to "set applications", the voicemail # is the correct one that leads to the voicemail on my old phone.  When people call me and I can't answer, they get a busy signal and a message that says this user is not accepting calls.

Even though I never did anything to make that the case.

Also, sometimes people will call me, and if I am in a place the phone can't reach, like the subway or any basement area, no "missed calls" message will show up, so I won't know.

This is very frustrating.  I already tried pressing ##002# but it didn't help at all.  Any help hugely appreciated!

Thank you!  

[Scholar Yoshi]

call customer service they will probalbly need to remove and readd your voicemailbox to get it working again. also check to see if you have any call forwarding active because that could cause this as well.