Develop Bugs

microUSB to audio ? (+ power source?)

Hello friends, I was a previous owner of the Galaxy S1 which had an incredible placement of the 3.5mm and the power connection
Basically when I use my phone on the car, I used to connect both cables on the same side of the phone and I would get audio on my stereo system while charging the phone (I used a normal dock to hold my phone)
But now with the GS2 I have a huge problem. The Micro-USB connection is at the bottom and the 3.5mm is at the top... This creates a huge problem for me at my car so...
I'm looking for a Micro-USB adapter that gives me both audio and another microUSB slot (So I can power my phone)
Does such thing exist or is it only possible to have one of them? Not both?
I also thought about buying the Desk dock and finding a place to fit it to my car, but that's very troublesome because the official GalaxyS2 dock is expensive and huge...

Just thought about this. Would a Micro-USB splitter work ? On the split connections I would connect the power and the Micro-USB to 3.5mm adapter
I also found this from Palm
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But it's discontinued

The official car dock has usb power and audio out via the micro usb port. It works brilliantly.

rob_h said:
The official car dock has usb power and audio out via the micro usb port. It works brilliantly.
Click to expand...
Click to collapse
But it's too expensive I think...
It has to be mounted on the windshield right?

I would love to find out about this as well, but I seriously doubt any good solution exists besides the stock dock.
Sent from my GT-I9100 using XDA Premium App

Arkanius said:
But it's too expensive I think...
It has to be mounted on the windshield right?
Click to expand...
Click to collapse
It's £34 but worth it IMO. Any reason why you don't want a screen mount? I have mine right at the bottom of the screen and it's never come off and is quite discreet.

rob_h said:
It's £34 but worth it IMO. Any reason why you don't want a screen mount? I have mine right at the bottom of the screen and it's never come off and is quite discreet.
Click to expand...
Click to collapse
Destroys some of the aesthetic of the car. I have a MINI Cooper and the holder I used was on the cupholder down by the Gear knob. All the cables were hidden and right by hand.
I'll try the Car dock since it has both charging and audio sources... But I think the cheaper solution would be the mini USB splitter.
I'll try both.

I'm interested in this too!

You need a micro usb connector.
Pin 1 connect to +5V
Pin 2 + 3 connect to audio l + r, Ground to Pin 5
Pin 4 connect to Pin 5 via 620k Ohm Resistor -> this triggers Car dock mode
Pin 5 connect to Ground
Go to Settings/Dock Settings/Audio-Output-mode
Pin 1 is right when the connector is in the SGS II and the screen is visible.
Voila, ALexander

This is also interesting to me.
I currently have a HTC Desire HD, and it does'nt send audio out via microUSB, so in the car I have a passive holder and connect a 3.5mm and a microUSB to charge and play music at the same time.
Anyway, I'm soon getting a Galaxy S II from work, and was wondering about the audio out and charging.
My car has an USB input, does the SGS both charge and output audio at the same time via the microUSB port? (My old Desire did )

If you feel like soldering:
http://forum.xda-developers.com/showthread.php?t=1321491

The official car dock has a screw connection for the cradle to attach to the suction mount so you could take it off.
IMO it is a great piece of kit and holds the phone securely even with the extended battery.

I bought the original samsung car dock but I'm having some issues:
- If I plug the USB directly to the car stereo USB port, the USB is not mounted.
- If I receive a call, the audio do not output from dock audio-out. If i plug the audio cable to the cell audio out, I can hear the call from car speakers, but not if plugged directly to car dock audio-out. Btw, if no audio cable is plugged, I can hear the call from SGS2 internal speakers.
Does anyone can help me?

1. i think the micro usb port is only for charge, not data...
2. this is the normal behavior of this car kit....ask to samsung why didn't make audio calls going out through usb connector. As this is about software maybe can be forced in some way by a modded kernel, but i couldn't find anything around...

Phone calls work through my car - via the micro usb.
It depends on the kernel you are using.
I use westcrip 8.6 ics rom - everything works fine.

I'm using CheckROM... it even if I use a specific APK I was unable to reproduce the sound through the dock audio-out.
Anyway, I can't belive that USB plug cannot mount. If I use a normal cable I'm able to mount, but with the dock I can't.

lar1r said:
Phone calls work through my car - via the micro usb.
It depends on the kernel you are using.
I use westcrip 8.6 ics rom - everything works fine.
Click to expand...
Click to collapse
Are the call working on stock ics too? What is your kernel?
edit:
i'm trying to make a bit of order on audio out/calls using car dock, take a look here
http://forum.xda-developers.com/showthread.php?t=1531483
Inviato dal mio GT-I9100 usando Tapatalk

This cable offers one solution, providing an adapter to iFern docking speakers.
I'd like a microUSB speaker dock though.

Looks like Philips Fidelio is an option.

Car dock phone audio

Hey guys, I've searched extensively for this but I really need a mod/app/kernel / rom that will allow phone call audio out on the original samsung car dock. Music works fine and it's loud and clear on car stereo but phone calls just get routed to phones own loudspeaker.
The Dock plugs into phone via micro usb then you plug in a 3.5mm headphone jack and separate charging cable into the dock itself
Any help would be really appreciated!
Sent from my GT-I9100 using XDA App

A mechanical alternative might be to get an audio jack splitter and a 3.5mm to 3.5mm cable, then plug that into the top of the phone and the other end into the splitter, which then goes into the dock with the one spare female jack being for a cable to the car audio input. No clue if that will work though, but in theory...

Cptnodegard said:
A mechanical alternative might be to get an audio jack splitter and a 3.5mm to 3.5mm cable, then plug that into the top of the phone and the other end into the splitter, which then goes into the dock with the one spare female jack being for a cable to the car audio input. No clue if that will work though, but in theory...
Click to expand...
Click to collapse
That's a good idea but liked the fact the dock is pretty hassle free. Just pop the phone in and everything is connected. Anyone have any other solutions or links to custom ROMs that have sorted this issue?
Sent from my GT-I9100 using XDA App

Cptnodegard said:
A mechanical alternative might be to get an audio jack splitter and a 3.5mm to 3.5mm cable, then plug that into the top of the phone and the other end into the splitter, which then goes into the dock with the one spare female jack being for a cable to the car audio input. No clue if that will work though, but in theory...
Click to expand...
Click to collapse
An audio splitter splits the audio, it does not combine it. What you want is a mixer, which is a different product (and usually much more expensive). A mixer is designed to attenuate the signal from the two inputs so that the combined output doesn't overload the speakers.
So in theory, it would not work. But in practice you might be able to get away with it as long as you don't try to use both phone outputs at the same time. But if you care about the speakers on your car, I wouldn't risk it.
To the OP, I think the phone will send both music and calls over Bluetooth, so you might look into a Bluetooth adapter for your car as a possible solution. Something like this: http://www.amazon.com/Britelink-Bluetooth-Audio-Receiver-Portable/dp/B0059M4G9K

Thanks for the advice!
Sent from my GT-I9100 using XDA App

claimui said:
An audio splitter splits the audio, it does not combine it. What you want is a mixer, which is a different product (and usually much more expensive). A mixer is designed to attenuate the signal from the two inputs so that the combined output doesn't overload the speakers.
So in theory, it would not work. But in practice you might be able to get away with it as long as you don't try to use both phone outputs at the same time. But if you care about the speakers on your car, I wouldn't risk it.
To the OP, I think the phone will send both music and calls over Bluetooth, so you might look into a Bluetooth adapter for your car as a possible solution. Something like this: http://www.amazon.com/Britelink-Bluetooth-Audio-Receiver-Portable/dp/B0059M4G9K
Click to expand...
Click to collapse
I know what you mean, but I don't think adding dual inputs to the line-in would in any way affect the actual speakers. I've used this method on various gear before and the result varies. Sometimes they mix fine, sometimes one signals essentially mutes the other.
A simple solution guaranteed to work however is to make a splitter that has a switch. More cumbersome, but it would allow you to manually switch from one input to the other when a call comes in.

surely it would be a quick coding hack to a ROM which would allow phone audio to be routed through the dock, after all that is what happens to music and GPS instructions... so why not phone audio!?

From the description of the Galaxy Dock Sound Redirector market app
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I suggest emailing the dev and asking which ones

I'm using CheckROM and I tried to use the Galaxy Dock Sound Redirector but it was unsuccessful. Maybe with samsung stock ROM?! Have anyone tried this!?

i read someone had luck on resurrection ics rom...but not the last release...

maybe you'd be interested on this thread....
http://forum.xda-developers.com/showthread.php?t=1531483

Try westcrip 8.6 ics resurrection ROM.
Works for me with phone and music through car speakers.
Please report back your findings (I am wondering if there is something else to this)
Note: I am sure it has to do with the kernel used.
Thx

I tried dock sound with GB 2.3.6 and works fine.
I think there's no suport for this dock with CM(7 or 9)

Help: car aux cable

My sgs3 is only 2 days old. I'm on the stock Rom. Not rooted.
When I plug my Mytouch 4g slide into my 3.5 mm audio cable, it assumes I am plugged into headphones and starts playing music through my car. (The headphone symbol shows up on the status bar.)
With my gs3. I plug the phone into my car and it continues playing music through my phone speaker and ignores the fact that I have a 3.5mm cable plugged in.(no symbol in status bar.)
Headphones work fine, however playing music through my car does not. What is the fix for this? New cable?
Sent from my T-Mobile SGH-T999 using Tapatalk
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do you have any kind of case on the sgs3? I noticed that some cases don't let you plug in the aux cables all the way and it doesn't get a good connection. make sure your aux cable is plugged in all the way. if that doesn't work try another cable to see if that's the issue.

rmelendez3 said:
do you have any kind of case on the sgs3? I noticed that some cases don't let you plug in the aux cables all the way and it doesn't get a good connection. make sure your aux cable is plugged in all the way. if that doesn't work try another cable to see if that's the issue.
Click to expand...
Click to collapse
Yea, I had this same problem. My case was preventing the cable from making a good connection. Took case off and works but now I hear music thru the left speaker. Anyone having this problem??? I tried a different AUX cable and I still have the problem. I wonder if there's a phone setting I need to change? Anyone please???
p.s. CD's and radio audio is thru both speakers but not phone.

deleted

I have a case but the aux cable I use is thin and goes all the way in. I am starting to think that the sgs 3 only likes the triple stripe plugs.(the ones on headphones that include a Mic on the wire). I'm going to look for a 6 foot male/male triple stripe 3.5 mm cable at fry's.
Sent from my SGH-T999 using Tapatalk

leoilios said:
I have a case but the aux cable I use is thin and goes all the way in. I am starting to think that the sgs 3 only likes the triple stripe plugs.(the ones on headphones that include a Mic on the wire). I'm going to look for a 6 foot male/male triple stripe 3.5 mm cable at fry's.
Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
Get Bluetooth my friend go wireless and you won't regret it, the hs3000 headset from Samsung is a great buy. In reference to you issue try another cable usually its the cable I have some cheap cables and a nice monster studio quality cord all work fine.
Sent from my SGH-T999 using Tapatalk 2

unplug it and reconnect. sometimes it happens. that fixed it for me.

leoilios said:
I have a case but the aux cable I use is thin and goes all the way in. I am starting to think that the sgs 3 only likes the triple stripe plugs.(the ones on headphones that include a Mic on the wire). I'm going to look for a 6 foot male/male triple stripe 3.5 mm cable at fry's.
Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
I have no problems with my regular 3.5mm headphone jack in my stereo, but I do agree that it is kind of touchy, especially with my case on. For a work around, I put my music on my SD card, and plug the usb into my phone, mount it as UMS with SGS3 EASY UMS, and Voila! Music on my stereo and control of the music through my car stereo vs the phone.

I got a new cable and having the same problems. Headphones still have no issue but I tested my phone connected to my ihome via audio cable and I'm having a funny issue where between songs if I press next, the speaker sounds like there's nothing plugged in. (Audio feedback) but then it stops when the new song plays.
Also... in my car I was able to play music if I plug the cable into my car and press play simultaneously. The 'headphones connected' notification comes up for about 1.5 seconds. If I press play while that notification is there, I can play one song. But then after one song finishes, the same problem happens.
Edit: I cannot produce the headphones connected notification by plugging the cable into my phone, only if the cable is already in my phone and I plug it into my car
I'm beginning to think that my headphone jack is not grounded properly so imma exchange the phone for another one if I test this issue with my friends gs3 and do not have the same problem
Sent from my SGH-T999 using Tapatalk

My friends sgs3 had some weird background noise in my car but it was working for the most part... it still wasn't perfect which makes me rather unhappy with the phone. Tomorrow I'm going to test my phone on my friends car radio to continue troubleshooting. Maybe I need to replace the audio jack in my bmw x3
Sent from my SGH-T999 using Tapatalk

USB-C to 3.5mm adaptor

Hello all, I was wondering if anyone knew where to get the OnePlus adaptor from other than their website. They are out of stock and I see what looks to be cheap knockoffs online.
Thanks

I got a google one from best buy yesterday for 9.99 and it works great. Here and now my luck its on sale for 8.99
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I bought the oem one on aliexpress for $3
https://www.aliexpress.com/item/Ori...995.html?spm=a2g0s.9042311.0.0.a94c4c4dZpcrUa

I'm a bit curious about the situation with the USB-C to 3.5mm. Do I need an adaptor with or without an DAC inside the adaptor, and what if there is an DAC inside or not?

Bradl79 said:
I got a google one from best buy yesterday for 9.99 and it works great. Here and now my luck its on sale for 8.99
Click to expand...
Click to collapse
Does the Google one have an included DAC like the OnePlus version?

vacs03 said:
I bought the oem one on aliexpress for $3
https://www.aliexpress.com/item/Ori...995.html?spm=a2g0s.9042311.0.0.a94c4c4dZpcrUa
Click to expand...
Click to collapse
Is that legit oem though?

chrisrj28 said:
Does the Google one have an included DAC like the OnePlus version?
Click to expand...
Click to collapse
Being a google product I am sure it does or if not better. I tested it and it sounded great in my car, I have an aftermarket system with Amps and a DSP and it sounded better than my OnePlus 6 and I am using VIPER4Android with it too. Well worth it.

Bradl79 said:
Being a google product I am sure it does or if not better. I tested it and it sounded great in my car, I have an aftermarket system with Amps and a DSP and it sounded better than my OnePlus 6 and I am using VIPER4Android with it too. Well worth it.
Click to expand...
Click to collapse
Great thanks for the info, I'll probably just swing by and pick that up. Waiting on OnePlus to restock will probably be a while.

psiLion said:
I'm a bit curious about the situation with the USB-C to 3.5mm. Do I need an adaptor with or without an DAC inside the adaptor, and what if there is an DAC inside or not?
Click to expand...
Click to collapse
There is no DAC inside the phone to output analog audio through the usb-c port. Any adapter you get will need to have one inside like the Google dongle does. If you are curious, check this out.
I personally don't think those little things sound that great and they can't drive sensitive IEMs or power hungry headphones very well from my experience, which is why I suggest products like the FIIO μBTR, BTR1 or 3, or Astell & Kern XB10, EarStudio ES100, so on and so forth. Of course the added expense is only worth it if you're driving good earphones, otherwise the Google dongle is just fine.

Elnrik said:
There is no DAC inside the phone to output analog audio through the usb-c port. Any adapter you get will need to have one inside like the Google dongle does. If you are curious, check this out.
I personally don't think those little things sound that great and they can't drive sensitive IEMs or power hungry headphones very well from my experience, which is why I suggest products like the FIIO μBTR, BTR1 or 3, or Astell & Kern XB10, EarStudio ES100, so on and so forth. Of course the added expense is only worth it if you're driving good earphones, otherwise the Google dongle is just fine.
Click to expand...
Click to collapse
Well that would explain why some dongles work and some don't. Thanks for the link, very informative.

chrisrj28 said:
Well that would explain why some dongles work and some don't. Thanks for the link, very informative.
Click to expand...
Click to collapse
Went to Target and got the Google adapter, was even cheaper for $8.29. so far so good, thanks for the info guys.

this also works with OnePlus 7 Pro, sound quality was ok, but it does still charge ur phone. No fast charging
Here

psiLion said:
I'm a bit curious about the situation with the USB-C to 3.5mm. Do I need an adaptor with or without an DAC inside the adaptor, and what if there is an DAC inside or not?
Click to expand...
Click to collapse
You can use either type of adapter. The Oneplus7 Pro does have an audio DAC inside it. I have tried both passive (just past through analog audio) and active (have a DAC built-in) and they both worked with the Pro 7. Some phones (Pixel for example) don't have the capability to pass analog audio out the USB-C jack.

Bradl79 said:
this also works with OnePlus 7 Pro, sound quality was ok, but it does still charge ur phone. No fast charging
Here
Click to expand...
Click to collapse
Have you tried charging with a USB pd charger? Since the op7pro supports that at least.
Also wanted to add my old HTC 11 adapter works

mtucker said:
You can use either type of adapter. The Oneplus7 Pro does have an audio DAC inside it. I have tried both passive (just past through analog audio) and active (have a DAC built-in) and they both worked with the Pro 7. Some phones (Pixel for example) don't have the capability to pass analog audio out the USB-C jack.
Click to expand...
Click to collapse
Which passive adapter did you try this with to verify that?

Elnrik said:
Which passive adapter did you try this with to verify that?
Click to expand...
Click to collapse
The passive adapters were these ADTRIP ones https://www.amazon.com/gp/product/B07NVDT57C/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1
The active adapter I tried was this Essential Products one. https://www.amazon.com/dp/B079GZFWQ9/ref=cm_sw_em_r_mt_dp_U_jOY3CbK6NJ8RC
For kicks, I tried them both on my Pixel XL (it has a headphone jack, but I thought I would try). Like the Pixel 2 and 3, it only supported an active adapter that has a DAC built-in. The passive ones didn't work with it.
It is nice Oneplus supports analog out the USB-C port as they are cheaper (the one linked above is only $8 for two of them and next day delivery for Prime members).

I'll bet dollars to doughnuts that adtrip has a DAC in it.

Elnrik said:
I'll bet dollars to doughnuts that adtrip has a DAC in it.
Click to expand...
Click to collapse
Although it is possible, it seems unlikely based on two things. 1. The ADTRIP adapters did not work on my Pixel XL. The Essential adapter did and we know the Essential has a DAC in it. 2. The ADTRIP adapter Amazon page specifically says it does not work with Pixel phones. Pixel phones need an adapter with a DAC built in.
Edit: Scrolling down further in the ADTRIP Amazon page, they have a chart that shows the specifications for each ADTRIP product. These two-pack audio adapters are analog (passive).

Oneplus usb c to 3.5mm is a passive adapter, meaning it uses internal DAC and running audio over usb port as analogue. It works the same way as mini jack output. But what oneplus done is they put small relay that turns OTG automatically when you plug in. All other analogues required going to settings and turning OTG every time you want to listen over headphones. Bare in mind this option turns itself off after 10 minutes of inactivity. I bought this and it's working fine. amazon.co.uk/gp/aw/d/B07MBWZZGL?psc=1&ref=ppx_pop_mob_b_asin_title

This works great for me, and you can charge while listining too.
https://www.amazon.com/gp/product/B07KS5NTST/
Only $8.19 with free same day delivery, can't beat that.

Internal microphone Issue when using Type C Adapter

Recently purchased the SM-N975U t-mobile variant. I begrudgingly purchased a type-c to 3.5 aux adapter to use my phone in my car for music.
I have the google brand adapter (not sure what it is called or if there are different types)
I noticed now when the dongle is plugged into my phone the microphone stops working on my device. I have to unplug the dongle to get the microphone on my device to work again which makes taking a call while driving a bit difficult.
Running through a few different diagnostics the phone is recognizing the aux adapter (google inc. Headphone adapter)
I'm assuming the device is attempting to use the headphone adapter as a microphone source (for headphones with an in-line mic). But my cars aux setup definitely does not have a microphone.
I've looked all through the settings on the phone for some solution as well as looking online but I have found nothing. I haven't been able to find anything online for anyone experiencing my same issue and I'm wondering if it might be an isolated issue with my device or maybe the specific adapter I have.
Does anyone have any ideas how i can keep the internal mic enabled while an aux adapter is plugged in?

I'll try this in my car. I didn't want a dongle so I simply bought a 3.5mm to USB C cord. Not sure if it matters.

I don't think it is possible without the software having the option. It is not just a headset dongle. The phone is feeding the audio to the USB C connector and looking for mic input from there as well. Those adapters have both the audio out and the microphone connection so you can just plug in any standard 3.5 mm earbuds or headset with a mic and make phone calls. It is similar to wanting the phone mic to work if you plugged a 3.5 mm headset into a 3.5 mm jack on a phone with a 3.5 mm jack. Manufacturers just design it so that the audio out and mic goes through that port when something is plugged in.
You may have to try a speaker and mic splitter cable with a lapel mic or something.
Also note that the Google adapters have a DAC chip in them. All of the adapters and a USB C headset that I had purchased for my Pixel 2XL work with the Note 10+. Except on one adapter the mic works for calls, but not for trying Bixby. That's the oldest adapter I have, so maybe it is only partially compatible.
The only other type of USB C to 3.5 mm adapter type that I am aware of does not have the DAC chip in them. If you look on, say Amazon, they will usually say not compatible with Pixel 2 or 3. Also sometimes will say not compatible with Essential phone, and a few others. If the price is really low, as in much less than $10 each they are likely not compatible. But again, it isn't the adapter that is the issue.

PsiPhiDan said:
I'll try this in my car. I didn't want a dongle so I simply bought a 3.5mm to USB C cord. Not sure if it matters.
Click to expand...
Click to collapse
Does the 3.5mm to type C cable let the phones microphone work still when its plugged it? I might have to try this.

AnubisYT said:
Does the 3.5mm to type C cable let the phones microphone work still when its plugged it? I might have to try this.
Click to expand...
Click to collapse
Yeah actually, it works fine. I just asked the Google Assistant for directions and it gave them to me without a problem.

I am having the same issue. I have used multiple adapters and none of them let the mic work right. It seems that the mic works for the ok Google command but that's it. Google can pick up the first command and not the second. This issue is so frustrating! I have the unlocked note 10 plus with the Google usb c dongle.

Brootalmaster said:
I am having the same issue. I have used multiple adapters and none of them let the mic work right. It seems that the mic works for the ok Google command but that's it. Google can pick up the first command and not the second. This issue is so frustrating! I have the unlocked note 10 plus with the Google usb c dongle.
Click to expand...
Click to collapse
I ended up following the advice of the replies here and went to amazon and picked up a 3.5 aux to usb C cable and it works perfectly.
I believe the dongles don't work with cars because the s10 note is recognizing the adapter as a headphone adapter and is looking to use the headphones inline microphone. I'm sure if the car had a built in microphone it could work with it but my car being an older jeep model does not have that. Like someone else mentioned in this thread, trying to use your internal microphone while plugged into a dongle to your car is the same as trying to use your internal microphone while a pair of usb C headphones are plugged in. It wont work.
I really wish manufacturers would continue putting aux ports on their phones but sadly that's just not how things are going to be.
Hope buying an aux to type C cable works for you and solves this problem since it fixed mine.

AnubisYT said:
I ended up following the advice of the replies here and went to amazon and picked up a 3.5 aux to usb C cable and it works perfectly.
I believe the dongles don't work with cars because the s10 note is recognizing the adapter as a headphone adapter and is looking to use the headphones inline microphone. I'm sure if the car had a built in microphone it could work with it but my car being an older jeep model does not have that. Like someone else mentioned in this thread, trying to use your internal microphone while plugged into a dongle to your car is the same as trying to use your internal microphone while a pair of usb C headphones are plugged in. It wont work.
I really wish manufacturers would continue putting aux ports on their phones but sadly that's just not how things are going to be.
Hope buying an aux to type C cable works for you and solves this problem since it fixed mine.
Click to expand...
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I have an older car with a 3.5mm aux audio input, and it works with these (the adapter must have DAC circuit included). "Ok Google", Phone calls on speaker in the phone, and also when using the car speakers, all work perfectly (in my case, phone mic always used therefore when in my car).
It's all in the quality of the USB-c to 3.5mm adapter - two items of primary importance, the adapter having a DAC and also handling the lead for the mic properly. The Samsung one is not available in black, so I use this (which works properly):
USB-C to 3.5mm Headphone Jack Adapter, USB Type-C to 3.5mm Adapter Nylon Cable [DAC Hi-Res] Compatible with iPad Pro New 2018,Pixle 2/XL/3,HTC,Samsung S8/S9/Note 8 https://www.amazon.com/dp/B07RMY3V9D/ref=cm_sw_r_cp_apa_i_PjBQDbQYN3YX9
That adapter when used in the car, I use with an extension cable (male on both ends) to connect to the aux input on the dashboard (as in the first picture - the cable has no lead for the mic).
When utilizing with earbuds for phone calls and the like, that same adapter can be used, but in this case the cable for the earbuds includes a lead for the microphone - see the second picture.
Some people have microphone issues in my opinion I believe the adapter has to properly include a DAC but also properly handle whether or not the microphone lead is connected. If no microphone lead connected, then adapter should work such that the phone "understands" there is no mic so the phone mic should be enabled.
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Use Lesser Audio Switch app. It perfectly reroutes your mic audio and resolves all your issues while using USB C adapters.