If you are looking at the TUN21A go instead for the T7019A. If fits the Frs/86 perfectly and is plug and play. But, needs rooting and a Bluetooth dongle (as does the TUN21A but it also needs a wiring harness and dash kit - the T7019A doesn't.
I have it working great for me as per the huge android head unit thread!
Fitment here
http://www.ft86club.com/forums/showp...&postcount=449
Running carscope (like torque but I prefer it) here
http://www.ft86club.com/forums/showp...&postcount=512
T7019A came with green LEDs. Change to red LEDs was done on my head unit by a mate and he put up the DIY here
http://www.ft86club.com/forums/showthread.php?t=42023
Thanks to @
GreenPants on the android thread my unit now starts up with a TRD symbol and then a Toyota logo with a spinning orange 86 and has the 86 piston logo as the wallpaper. Small things but make it perfect.
Runs Sygic maps and music will play at the same time.
Perfect for me but takes time to root and set it up right so not for anyone that doesn't want to play around. I didn't know anything about them until reading @
2forme's thread. Well worth a read if you have a couple of hours to read through it all. I learned heaps.
http://www.ft86club.com/forums/showthread.php?t=29723