I need assistance,
Bought and installed 3 days ago and I never got no sounds during any calls. Tried rebooting my Iphone 13 and the audio unit still no change.
I also get a thump noise from the speakers when turning on and off the acc of the vehicle.
I am wondering If i have a defective product? Or any software updates? Anything helps.
eveythingelse works so far.
Please before I make any return.
@Support Dasaita please help Thank you
@Jeric Vergara
Hello,
Thank you for your contact .
Please take a picture of Settings>About machie> MCU .
We'll send you a new MCU to update.
@Support Dasaita 
@Jeric Vergara
Hello，
Thank you for your kind reply.
Please update the MCU to resolve no sounds for phone calls.
MTCHS_ZST_V4.15f.zip
https://www.dropbox.com/scl/fi/zjk57mppsli9nnmc9vubs/hmcu.img?rlkey=buxs8jrlxzn00j4488ze6sc0d&dl=0
1.Download the files via link on computer.
2.Copy to the USB driver and insert to the USB cable
3.Go Settings>System>MCU updated
Thank you for your time.
Thank you for the update.
but I still have no sounds during calls. I cannot hear them, they can't hear me. I mostly use carplay. I tried unpairing and resetting both phones and the unit still the same issue.
@Support Dasaita 
that MCU update is for G12 or G13?. You never asked for which model of headunit had the customer.
I have G12 under Android13. Is there any MCU upgrade for the G12unit? I currently have some microphoone issues;
The microphone works ONLY for calls, but never worked for any Android app, I cant use the google assistant
@Iker Gomez they should be aware that I have G13. And I don't think we have the same issue?
@Support Dasaita Please continue help me navigate this problem. Thank you
@Iker Gomez
Hello，
Thank you for your contact.
For the google assistant not working, could you take a picture of Settings>About machine>Build number&MCU ?
Thank you for your cooperation.
@Jeric Vergara
Hello，
For the phoning call no sound, the sound of Jeelp with JBL comes from the rear speaker, while the voice of the Dasaita unit comes from the front speaker.
Please try this MCU MTCHS_ZST_V4.15b.zip
https://www.dropbox.com/scl/fi/ku98xsv0pui1sf1s87wtn/hmcu.img?rlkey=9nl9qag8r6izh04uodx7tj19q&st=b0m3iur4&dl=0
Thank you for your time and patience in advance.
@Support Dasaita
I have been monitoring it for a week now and I am happy to tell you that my issue is solved.
Appreciate your support!
@Jeric Vergara
That sounds great.
We value your input and appreciate your evaluation of our services in your order.
We appreciate your time so much.
