[Release][PX3|PX5] MtcDialer :: Make hands-free calls

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New member
Feb 27, 2021
[QUOTE = "Cicciobello12, post: 84582783, membro: 11119137"]
prova a resettare la voce dell'assistente
i tried, but nothing to do...


New member
Feb 27, 2021
Update: now the call starts but Mtcdialer, even if I set it as the main dialer app, doesn't start. Please, someone can tell me if there is another version of Mtcdialer (I have 1.2.2) that solve this problem? Thanks to all

[QUOTE = "Cicciobello12, post: 84582783, membro: 11119137"]
prova a resettare la voce dell'assistente
ho provato, ma niente da fare ...


New member
Mar 20, 2021
Hello everybody, I ask you kindly and desperately for help from you experts. I bought an ERESIN 8149U Android 10 PX5 car multimedia. I tried to install MTCDIALER 1.2.3 and 1.3.0, but both, once started tell me: "Bluetooth is not available" and therefore I cannot use the voice phone call. Could you please tell me the right version of MTCdialer that I need to install? I am attaching a screenshot of my device's MCU properties. Thank you so much in advance.


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New member
Aug 24, 2019
I too in your same situation with a Bosion (see MCU photo) I'm afraid there is no solution. if not to buy a Dasaita seems to be one of the few able to make voice calls with Google. a challenge for you to find a solution. if it exists.

Anch'io nella tua stessa situazione con un Bosion (vedi foto MCU) temo che non ci sia soluzione. se non per acquistare una Dasaita sembra essere uno dei pochi in grado di effettuare chiamate vocali con Google. una sfida per te per trovare una soluzione. se esiste.
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Oct 28, 2017
I am working to make our devices as much "hands-free" as possible (I do not like to be distracted while driving :)). I want to introduce new app from hands-free set that I am currently developing.


If you enjoyed using of the application, you can support my work and Donate to me :eek:.
Hi f1x me and others need your help. I bought and Android HU from Aliexpress but the HU is not an MTCX. The stereo is a

PX5 RK3368 with MCU S32F0.​

I tried your app to make call via Google Assistant but receive an error message Bluetooth not available.
Can you help us to use MTCDialer with our unit?
I pull out the BT apk from the system/app of our system.
I'd like to pay for your work and share with others if you think you could help us with our unit.
Wish you can help us, thank you in advance, mauro.


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Senior Member
Dec 16, 2010
Samsung Galaxy S22 Ultra
Is there a way to make google assistant use this as the dialer to make voice calls, I know you used to be able to do it with google now, but assistant keeps telling me there is no app I stalled for calling

Edit: nevermind, I see this has been asked a million times on this thread and is a common problem.
Last edited:


Sep 1, 2014
Gard (30)
hello, how do we need to install after extracting it from the rar file?
Good evening,

The link below contains APK file for version 1.3.0



Apr 24, 2018
I have installed MtcDialer v1.2.3 on my Dasaita Max10 with the current ROM HA3_rk3399_10.0_ota(20210507) and in Google Play I have disabled auto-updates so that the "Google" app is not auto-updated. The version of Google App included on this ROM is, and I use the latest Google Assistant version 0.1.187945513.

When the radio has an internet connection, I can say "Hey Google, call mom", and it works fine using my contacts.google.com account, but if there is no internet connection then it fails to find the contact, and displays the message "Can't reach Google at the moment".

Is it possible to to configure it to use my iPhone's contact list instead, or even a local contact list stored on the radio in case there is no internet available?


New member
Aug 26, 2021
This version MtcDialer-1.2.2 work with PX5 and android 8. Install it and from Google call 03000 touch telephon icon and select MtcDialer as default app.


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Senior Member
Jul 10, 2010
Realme GT
MTC dialer is compatible only with MTC units!!!
It doesn't work on sf0, s32f0 or stm32 or any other unit that doesn't show the letters MTC in MCU number!
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Oct 7, 2021
Hello.Is only MtcDialer modified by Hal9K for his firmware.Work for me very good with last Dasaita firmware and MCU.Uninstall before any others version of MtcDialer after ,instal it, set it like default dialer in Google voice and use it with Assisstant from Google.That is it

Sorry for link it is wrong
This is good
can u please reupload it. It seems it's been deleted.


Oct 7, 2021
Is this happening also if you use MtcDialer without Google Assistant? For example, making a call from the Contacts app (https://play.google.com/store/apps/details?id=com.google.android.contacts)?
MtcDialer should have nothing to do with the microphone itself, it just interacts with the unit's Bluetooth Service.
I saw people with similar problems on other devices with Android 10: https://support.google.com/assistant/thread/16892191?hl=en&msgid=33863323

MTCDialService is the same as MtcDialer, without the voice input part, you can try it...
Hi Scorillo,

Can u please provide the MTCDialService APK file. independent from mtcdialer?

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  • 13
    I am working to make our devices as much "hands-free" as possible (I do not like to be distracted while driving :)). I want to introduce new app from hands-free set that I am currently developing.


    23.06.2017: Version 1.2.2 has been released.
    21.06.2017: Version 1.2.1 has been released.
    21.06.2017: Version 1.2 has been released. Thanks to @scorillo_ro.
    19.06.2017: Version 1.1 has been released
    19.02.2017: Version 1.0 has been released

    If you enjoyed using of the application, you can support my work and Donate to me :eek:.
    Android9 version

    A few weeks ago I created a pull request for the android 9 changes for MtcDialer on github, but it seems like @f1x is no longer active :(
    I am releasing this version without his approval... The credits still goes to him for this great app. Thank you @f1x


    It is working good on my Android 9 PX6 unit
    I have the contacts in the Bluethooh app inside so that not only the phone number shows me the number but also the contact name.
    OK, let's explain this one more time, hopefully for the last time, how these units works.

    The headunits have a bluetooth module connected to the MCU board (it is not integrated to the Android SOM).
    The module have its microphone connected to the MCU microphone, its audio out connected to the MCU audio mixer and it is connected to the Android SOM via the USB hub also on the MCU board. Android OS controls the BT module via AT commands.

    So this BT module is not used as the one in your phone, it has only a limited functionality. It is mainly used as a handsfree headset (can also interact with some ODB adapters).

    To be able to use this BT module for receiving and placing calls, the chinese developers created some special services and applications. The main user interface (app) is that Bluetooth app. So in the stock ROM Android OS does not know it can place and receive calls, because the unit does not have a GSM module with SIM card.

    That Bluetooth app is using contacts that are downloaded from your paired phone.
    Standard Android dialers uses contacts from the android/google account set up on the unit (not the one on the paired phone). OK Google / Google Assistant will try to use contacts from this contacts list!

    What MtcDialer does, is to be an adapter for those Bluetooth services mentioned earlier. When the android is trying to place a phone call, MtcDialer will use that chinese proprietary apps/services to place the call via your paired phone. That is why you will see the same user interface for the outgoing call, because it is using that Bluetooth app. The app will dial the number (digits) received from MtcDialer, but will display the corresponding Contact Name downloaded from the phone (not from android contacts).

    So if you use the Google Assistant and ask to place a call to a contact, it will search that contact in Android Contacts, will take the phone number (digits) from there, will use MtcDialer to place the call, MtcDialer it will use the Bluetooth app to actually place the call, so the name displayed when the call is in progress it is the name downloaded from the paired phone.

    If you use the same Google Account on the car unit and on the paired phone, you may not spot a difference. But, as I do, use different Google Accounts, you will see the difference.

    Because the android on these units was designed to only work as a Bluetooth Headset, the stock ROM does not even have the Google Contacts Sync adapter and a Contacts app installed.

    I hope everyone understands how things are working and see less complains about Google Assistant not finding the contact.

    Just a hope :)

    I'm searching for this version but i can't find it on the forum, i only find ROMS… Do you know where i can find it please ?

    Thanks you

    Consider using his entire ROM. It has many cool features.
    Also consider donating to him for his hard work! https://forum.xda-developers.com/donatetome.php?u=5092263
    MTCDialer Installationguide for Newbees, Beginners, Dummies....

    Hi to all,
    I write this, because of my own expirience. There is a misunderstanding, how to install.
    How to install it the right way you can see here: https://www.youtube.com/watch?v=l8JbDGoSvjA
    Unfortuanally it`s german, but watch it exactly and you are able to use the dialer.
    Other way is to read my guide:

    ---NO ROOT NEEDED!!!!
    ---MCTDialer 1.2.2 works with usual px3 and px5 HU ( xtron, erisin, witson, and so on) and Android 6 or higher.
    ---Google assistant ("OK Google") has been installed CORRECTLY. Best way including it is working offline too.
    ---Download the MTCDialer apk to your HU, refer Post #1 or use the links coming with the linked clip above.
    ---when you have google assistant on your phone too: make sure it is not able to react parallel.
    (Normally if your phone is turned on but not activated (screen is dark), otherwise disable activation by saying "OK
    Google" or your voice) at first.
    ---when you use a contact app on your HU then disable it... There is no need for, when you initiate mtcdialer the way described below. (You can delete it after succeed testing the installation guide)

    Installation (true step by step):
    --- connect your phone with your HU via bluetooth.
    ---make sure the embaded HU BT is really paired with your phone.
    ---install the MTCDialer apk. (after direct download you will find it in the internal storage/download folder) on the int. storage
    When installation is ready don't open the mtcdialer, just click finish. (click even means push on it with your finger)
    ---Open the Google BrowserApp himself (do not open the google assistent or Chrome or Firefox or something else)
    ---use the searchbar and WRITE: call 03000 ( you can use your natural language, if you install it with google assistant) and press enter or go or ready
    ---click on the first blue colored phone icon (under the searchbar)
    ---Now there are presented some icons. You choose the mtcdialer by click it (remember: with your finger)
    ---At next click on the second phone icon* to start the call *( mostly a blue circle with a white phone)
    ---When the phone bar appears click on the red button. mtcdialer now is stored as default using app. (IMPORTANT)
    ---Say "OK Google call mom in law" (When you saved her as dragon then say "OK Google call dragon", cos google don't know about the nickname you gave. When you stored dragon with more than one number, the assistant will request which one is to use)
    ---It should function now. So be happy and face your next problem, e.g. with the dragon sitting beside you during this procedure

    I hope this guide helps you. I read it to my rave and he was succesfull using it.
    So I'm sure you will succeed too.