[MTCD Android Head Units General] Matt Kirby:
Sorry – this is a bit long, but thought it useful to add here rather than fracturing things into another thread.

TLDR: I love this unit, and have no major issues - I'm not getting any battery drain.

I used to have an AN-21 U unit which was getting a bit slow. I've now purchased an Xtrons VW specific unit, without DVD or front-mounted ports (no USB or SD): http://xtrons.co.uk/pb96mtvapl-9-hd...reo-custom-fit-for-volkswagen-seat-skoda.html - it has a 9" screen!

My notes after playing with it for a couple of weeks:

USB:

Two USB ports in the back, doesn't seem to be any difference between them, a USB hub (such as https://www.amazon.co.uk/gp/product/B0026RYWYU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) works well.

Canbus:

Steering wheel volume control and mute works, track skip buttons work properly in Radio but not DAB or Spotify. Problem is the canbus adaptor - using the one from my old headunit makes the buttons work as expected, but then the Vehicle Info app doesn't get any info. SpotifyKeys app makes track skipping work - however the car's ECU display also sees the keypresses so cycles through it's menus at the same time - it's not told to be in "audio" mode as it is when the radio is playing.

Reset button:

Doesn't seem to do much - just goes to sleep like the power button does – except you need to press it for longer with a paperclip!

Radio:

RDS works (station name and extra details (track, DJ/show, etc)) - supplied canbus just outputs the station frequency and preset number to the car's ECU display - not the station name (this might be a VW limitation - my old unit didn't do this either).

DAB:

Factory installed app has broken audio unless the app is in the foreground, updated app resolves this (http://forum.xtrons.co.uk/forum_pos...pp&title=pl91mtvap-dab-jumping-when-minimized).

Other DAB apps don’t work (specifically:Navall: https://play.google.com/store/apps/details?id=com.dab.navallstore, Wavesink: https://play.google.com/store/apps/details?id=de.ses.wavesink, Dab Player: https://play.google.com/store/apps/details?id=com.ex.dabplayer).

DVR:

Built-in app limited, but once you set it recording you can leave it alone. It will auto-stop on shutdown, and auto-resume recording the next time the HU starts - which is awesome!

My only concern now is managing the video files when space gets low. I've set up a Tasker wideget to run a task to "delete all older than..." as per https://xdaforums.com/android/apps-games/tasker-automatically-delete-images-6-t3139526 (I did need to change the command used however, as per: https://xdaforums.com/showpost.php?p=69161582&postcount=27). Also tried Daily Roads Voyager, CaroO and AutoBoy - none of them work satisfactorily - mostly they crash or do nothing on start-up or record.

Power:

I've had no problems - I've left the car unused for 6 days and it started as it did before. As I have a VW specific version, on the wiring loom there was a cable with a joiner that needs to be separated if you use canbus (see http://forum.xtrons.co.uk/forum_posts.asp?TID=143648&title=solutions-for-car-battery-drain-issue). I do like that the unit is up and running within a second or so, and continues running during cranking the engine.

Wifi:

Haven't really noticed major issues - but then again I use the hotspot on my phone that’s very close to the antenna which isn't exactly a challenging range for it.

Tasker:

Yup, killed after sleep (as with pretty much most things, apart from the last foreground app). I'm using a work-around (https://xdaforums.com/showpost.php?p=71609609&postcount=8) to start Tasker with one tap on the screen.

OBD:

I have a OBD HUD unit which also does Bluetooth (https://www.amazon.co.uk/gp/product/B00ZWPELJY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) - however can't get anything on this unit to use it. It will pair, but Torque or DashCommand don't see it. A USB cabled OBD however does work fine.

SatNav:

Waze works perfectly (although does need to be side-loaded), Nokia's Here seems to work well (so far).

Root:

KingoRoot then SuperSU worked perfectly. I tried SuperSUMe and it didn't seem to work.

Built-in mic:

Seems to work fine - during a phone call the person on the other end said it sounded fine, and voice search works well.

General speed:

I haven't used an MTCB unit so can’t compare to those, but my old AN-21 U was getting slow. This unit is far better and has been very snappy – I’ve had it recording dashcam in the background, running music (Spotify or radio/DAB), Waze, with Tasker, GMD Immersive, and Twilight as well without any noticeable pauses or problems. For the moment I think the PX5 units are the ones to get!

Sorry for the very long post, hopefully there’s some info in here that will help others.

---------- Post added at 01:21 PM ---------- Previous post was at 01:08 PM ----------

Forgot to mention - my unit from Xtrons did need some "adjustments" before it would fit into my Mk5 Golf - I had to file down the corners with a Dremel before the car's facia could fit over it.