For those having Android Auto wireless issues with firmware 1.02 on the Pioneer NEX4400, here is a link to the original internal firmware version 1.0. You'll need to write this to the internal SD card on the unit in order to downgrade it. In my personal case, I wrote this image to the card, then upgraded the firmware to 1.01 and it completely solved all of my android auto connection issues. There is some kind of issue with android 11 and firmware 1.02. So this was the solution. Here is the link: _btd_DcOLONqcjjVtRTkXgPG2SQ/view?usp=sharing