8100NEX, Android Auto pops up for a second on AV screen, then goes away..Its set to Others,USB 2,Android Auto..Then when it may stay highlighted longer, you can touch the icon below the APPS in the upper left hand on AV screen, says something like reading unit or connection or whatever, and it says that for however long my phone is plugged in...2 minutes, 5 minutes, 10 minutes.Sprint Samsung Note 3 with Lollipop

If its the first time connecting it to your phone, most of the setup output will be on the phone itself.....do you have android auto on your phone?

Yes.android auto app stays on the same screen..has alittle image, then below it asks if this is the first time in a car connection, then below to delete all cars i think

Yes.android auto app stays on the same screen..has alittle image, then below it asks if this is the first time in a car connection, then below to delete all cars i think

Is your 8100nex "parking brake" wire connected to ground or to the car's parking brake wire?

I have the 4100 and Sprint note 3. I am having the exact same problem. Using the micro bypass so i get video all the time.

This is frustrating. Waited so long to get this unit and android 5. Tried several cables. It wouldn't recognize my wifes htc m8 either.

8100NEX, Android Auto pops up for a second on AV screen, then goes away..Its set to Others,USB 2,Android Auto..Then when it may stay highlighted longer, you can touch the icon below the APPS in the upper left hand on AV screen, says something like reading unit or connection or whatever, and it says that for however long my phone is plugged in...2 minutes, 5 minutes, 10 minutes.Sprint Samsung Note 3 with Lollipop

Try enabling the USB Debugging under Developer Options in your Phone Settings.

That's what I did and it allowed my phone to start the Android Auto setup on my phone and I set it up and all that... but still cant get it to show in the 4100NEX... it goes into a black screen and then it says that it cant run blah blah...

8100NEX, Android Auto pops up for a second on AV screen, then goes away..Its set to Others,USB 2,Android Auto..Then when it may stay highlighted longer, you can touch the icon below the APPS in the upper left hand on AV screen, says something like reading unit or connection or whatever, and it says that for however long my phone is plugged in...2 minutes, 5 minutes, 10 minutes.Sprint Samsung Note 3 with Lollipop

Sammy devices are having issues with connecting to android auto. It's some "feature" Samsung added to their devices that isn't playing nicely with Android Auto.  

Look in the forums on Android Central - there's a bunch of people with this issue... 

I had to play around with it a bit but I got it to work on my Note 3. There were 2 different "instances" of Android Auto when I first plugged my phone in: One that opened when I opened the app on my phone and one that pops up when I plug phone into stereo. The one that talks about deleting all other cars isn't the one you need. I restarted my phone, then plugged it into stereo, the stereo tells you to look at phone when it is safe and legal to do so, then your phone should have an instance off Android Auto that has you going through different screens and tres to get you to sign up for some trial.