okay I downgraded to AT&T 4.0 via
http://www.everythingicafe.com/forum...pcc-50201.html
VVM works and so does tethering but I still cannot edit my "Cellular Data Settings". That's fine with me as long as I am notified of voicemails and can tether.
UPDATE: Correction, After downgrading to AT&T 4.0 I can no longer tether but voicemail works well.