I figured out how to fix my phone after the "black screen" update. I downloaded the latest working firmware file and re-installed it and the phone came back up just fine. Just download "RUU_Evita_UL_Cingular_US_1.85.502.3_R2_Radio_0.17.32.09.12_10.86.32.08L_release_262092_signed" and restore the phone.