@36dbldz
(u installed it right? 5.0.0.348 ) reinstall it (don't forget to delete vendor.xml in the program files/common files/research in motion/appworld foldor), without ur simcard in your phone. i think its because of ur provider)
download bbsak 1.7 or whatever 1.3 is also cool. wipe ur phone
then reinstall it without simcard. and memory card.
(format your memorycard in your computer)
and insert it blank in your blackberry after the installation
If it still don't work

KILL ATT (A)
Cus i read that alot of ATT users have problems with it..
i would say its the ATT VSM <-> But some say its the service book.
Well i cannot test it cus i don't have a ATT Phone/VSM nor servicebook. so if this does not work and u have ATT.
It could be a no Go!
Let me know if this works. later!
Do the first boot without the simcard.. and memorycard
Do the second boot with simcard -> after the installation is completed.
Reinstert your memory card
And do 3 battery pulls
Think it should work then