[Android Head-Units] kaween:
Hey, I'm far from all-knowing. But what i DO know is that there are a lot of these so-called "Android 4.2" and higher.

And when you flash them, and then try to run an APK that needs a higher version than 16, they will throw a "parser error" in your face. When you compile the stuff to an API16 model, it runs.

Hence, they are _lying_.

I'm not saying it's 100% impossible that we'll ever see a real 4.2 or 4.4. But providing a "real" 4,4 can't just be done by some seller in Russia or whatever : it can only be done by the developer of this platform.

Anyhow so far I've only seen fakes, and 2.9.4 is not any different (for the AN21 that is. Please be informed that there are 4pda parts that are not about the AN21 but about the Huifei Rockchip 3066 machines, and they DO have a real 4.4).

---------- Post added at 06:47 PM ---------- Previous post was at 06:32 PM ----------

What you have there is a Rockchip 3066 design, so in hardware terms, you should visit the Huifei part of the forum.

However. Stuff like power drain is pretty universal. It depends on how you wire your aftermarket radio.

If you put this kind of radio and slap it straight onto the 12V batt, forcing a "I'm getting power no matter what", yes, these units will drain your battery after 5 days of "just sitting there". Latest after a week, your car will not be happy with you and show you a middle-finger when trying to start.

If you wire it up like you SHOULD, no, it will not drain your battery dry or better said, it SHOULDN'T.

All the people I know who complained about "my aftermarket radio sucks my battery dry at the rate of knots" ALL wired both ACC and Batt+ directly to the Batt line of the car, so they can force a "I can switch on my radio even when I've not put ignition on or turned my key into "position one".

Bad practice by any standard, and if you drain your battery in such a case, it's only you who's to blame. Wire it up like you have to (connecting ACC to ACC, Bat+ to Bat+) and I'm pretty sure you will have no issues.

The problem is that with many factory installed units, those radios will "automatically disconnect" after 10 minutes of playtime without the ignition on or engine running. These Chinese units most of the time will not permit the unit to work when the ignition key isn't turned.

Or people complain about the fact the unit reboots while they're turning the ignition key (something which aftermarket units will do quite often as they lack the factory-equipped stuff to prevent this issue) and .....

So people start doing stupid stuff like "hey lets connect the thing directly to the car battery, the thing doesn't pull that much power anyway".

And 5 days later, they're surprised their battery is flat and start contemplating about the chances their car battery starts dying after mounting the aftermarket unit, and go out and buy a new battery only to find the new one does the same.

DUH. :silly:

---------- Post added at 06:57 PM ---------- Previous post was at 06:47 PM ----------

Hmm. The "sound not working from 3th party apps" is typical for a sound-focus issue. Look at the sound settings of your car, and choose "3th party" instead of "Intelligent" audio priority settings. Should solve that issue.

As for the "takes ages to mount sd card and then fails 50% of the time", I've read several people report this issue and they posted a couple of solutions. You'll have to search for them, I'm pretty sure those comments where made within 2015 so that should narrow your search. Also, it seems like Sygic is really vulnerable to this issue, as I've never seen people complaining about this when they use Igo, Tomtom or Here to name just a few.

PS : one last generic remark about these AN21-U units. I've seen several threads where people ask about the AM-Tuner capabilities of unit such-and-so. I've been experimenting with that this weekend after owning this unit for a year now. To my surprise, the AM reception is pretty good, both in stationary status as while driving and that with a passive arial. BUT, you have to search for the channels manually. The Auto-search is completly crap, and won't find anything. Switching to manual search provided me with 10+ very strong AM stations. Odd that the autosearch fails to pick them up.