Do you have Advance App control?? You would be the first I have heard. I bought my AVH-P8400BH last may and it worked quirky with an iPhone 4. I waited until the CD-IV202AV was release before I purchased an iPhone 5 along with an extra lightning plug and the vga adapter. Successfully updated the bluetooth to HW05-SW01.27.20, then waited for and updated bluetooth to HW05-Sw01.30.10 successfully. I successfully updated with USB all firmware:CWW6774_Ver9801.YUK ((SYS) System Update, Part 1)
CWW6778_V825.HAT ((R2R) System Update)
CWW6774_Ver824.YUK ((SYS) System Update, Part 2)
and no Advance App,