Develop Bugs

Bluetooth car-kit: hands-free and stereo audio

I have been using the Touch Pro 2 for a little while now, and I must say: no regret at all that I've bought it.
But the reason I post here is because I'm having a problem with my car-kit and the Touch Pro 2 when they are connected through bluetooth.
First of all, some data about the car-kit
Car stereo: JVC KD-BT22
Bluetooth functions: handsfree calling and Bluetooth Audio Streaming
Bluetooth version: 1.2 certified
Profile: HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3
The situation:
When I pair the devices I can check two options:
1) Handsfree
2) Stereo Audio
This should be fine, but the problem comes next:
- When I both check handsfree and stereo audio, I don't get any streaming audio (I just hear about one second the song which is playing at the phone), if I call or get called nothing hapenned except the display of the phone showing the caller. The car-kit just keeps playing (for example) the CD.
- When I uncheck the stereo audio, just connecting the handsfree everything works "fine" (some small problems, not mentionable).
- When I only connect stereo audio the same happens as described before: the song which is playing at the phone I hear about one second, and after that it's silenced (the song is still "going forward", but no sound, nor on the phone, nor on the car stereo).
I've tried different set-ups, searched the forums and didn't saw anyone with this problem/no sollution, so I hope someone could help me.
This happened with the Stock Rom and also the custom rom I'm using right now, no difference. When I connect a stereo headphone (from Nokia) through Bluetooh, everything works fine.

don't pair from the phone use your Radio to pair...i had the same problem with my Pioneer at first so i searched for the device from my stereo and it worked just fine and ...i hope this helps... and make sure your discovery is always on...take care!

Well, that in a case makes sense...
The carkit also connected to my phone when discovery was turn off. Seemed strange to me already. A little, maybe stupid, question: what do I need to swith off/turn off on the phone so the phone won't connect to the carkit, but that I have to let the carkit connect to the phone?

HTC aware
I have similar problems with the BT stack in the TP2, which is disappointing having migrated from a Snap. I e-mailed HTC who admit they are aware of BT problems with the TP2 and advised me to keep an eye on the support page for a fix.

apv245l said:
I have similar problems with the BT stack in the TP2, which is disappointing having migrated from a Snap. I e-mailed HTC who admit they are aware of BT problems with the TP2 and advised me to keep an eye on the support page for a fix.
Click to expand...
Click to collapse
I also tried mailing HTC about this problem. The reply wasn't so hopegiving
"We're sorry, but the carkit isn't compatible. Please fill out the form for our technical support team"... Summary: I've not been too lucky with this combination
Hope they might do something about it after all. Me just thinking that Bluetooth = Bluetooth, but it's more complicated than that.

I also have the same problem with JVC-KD-AVX2 streaming audio. couple of times i did manage to get it to work, but once the stereo is turned off and on, i lose the streaming again.
i called HTC and emailed them. one said my stereo is not compatible, but i did have it working kind of.
not sure what the problem is as the touch pro1 worked fine. also my friends N97 worked fine

did all of you use your stereo to search for your phone or your phone to search for your stereo... if u used your phone then try using the stereo to to look for your phone under the connections menu and it should work

nemo0405 said:
did all of you use your stereo to search for your phone or your phone to search for your stereo... if u used your phone then try using the stereo to to look for your phone under the connections menu and it should work
Click to expand...
Click to collapse
Sorry for my late reply.
I can't connect/pair the phone using the stereo, to bad.

Well, I have the Pioneer Stereo and what I discovered was you have to do it from the stereo. For some unknown reason it errors out from phone. Since that, I have no problems, further more it reads my text as well as incoming e-mails. Hope that help

DownNeverOut said:
Well, I have the Pioneer Stereo and what I discovered was you have to do it from the stereo. For some unknown reason it errors out from phone. Since that, I have no problems, further more it reads my text as well as incoming e-mails. Hope that help
Click to expand...
Click to collapse
Which Pioneer are you using? I'm using the F700, and for some reason it won't mute the radio when in a call. I haven't gotten time to mess around with it much though. Reading incoming texts would be great.

i bought a car kit MP3 player for my car. I paired it with my TP2 and enabled the "BT Audio" and "BT Handsfree". Outgoing calls work fine with no problems at all. But during incoming calls there is a problem. If the incoming call is from someone saved in my contacts, the BT carkit does not ring. If its from an unknown number (not saved in my contacts), it works perfectly. I tried all the tweaks and hacks in this forum but nothing worked. Anymore ideas.

nemo0405 said:
don't pair from the phone use your Radio to pair...i had the same problem with my Pioneer at first so i searched for the device from my stereo and it worked just fine and ...i hope this helps... and make sure your discovery is always on...take care!
Click to expand...
Click to collapse
x2, exact same problem with MY pioneer on 6.1 ... took me an hour to figure out how to pair it correctly, and it happened completely by accident out of frustration while I was pounding my fists into the horn haha. Now I know better...
set your phone to discoverable, then pair from the radio, confirm on the phone. good luck - Mark

qaliza said:
i bought a car kit MP3 player for my car. I paired it with my TP2 and enabled the "BT Audio" and "BT Handsfree". Outgoing calls work fine with no problems at all. But during incoming calls there is a problem. If the incoming call is from someone saved in my contacts, the BT carkit does not ring. If its from an unknown number (not saved in my contacts), it works perfectly. I tried all the tweaks and hacks in this forum but nothing worked. Anymore ideas.
Click to expand...
Click to collapse
The only thing I can think of is that maybe you have different ringtones set up for contacts and unknown contacts. Or your carkit is broken.
Hope this helps - Mark

qaliza said:
i bought a car kit MP3 player for my car. I paired it with my TP2 and enabled the "BT Audio" and "BT Handsfree". Outgoing calls work fine with no problems at all. But during incoming calls there is a problem. If the incoming call is from someone saved in my contacts, the BT carkit does not ring. If its from an unknown number (not saved in my contacts), it works perfectly. I tried all the tweaks and hacks in this forum but nothing worked. Anymore ideas.
Click to expand...
Click to collapse
RADRaze2KX said:
x2, exact same problem with MY pioneer on 6.1 ... took me an hour to figure out how to pair it correctly, and it happened completely by accident out of frustration while I was pounding my fists into the horn haha. Now I know better...
set your phone to discoverable, then pair from the radio, confirm on the phone. good luck - Mark
Click to expand...
Click to collapse
Try the cab from this thread ------> Fix for playing ringtones over bluetooth headset.
It's meant so that the actual ringtone you have set will play on the car kit. I know my car kit used to have its own ring which was... boring to say the least. Now the various ring tones set to people on my phone play through the car kit. Anyway... This MIGHT fix the issue you guys are having as well.

RADRaze2KX said:
The only thing I can think of is that maybe you have different ringtones set up for contacts and unknown contacts. Or your carkit is broken.
Hope this helps - Mark
Click to expand...
Click to collapse
Yes i do have diifferent ringtones for contacts and also different pictures. The problem is in the contacts name. When i remove the name and leave it unnamed it works fine.
Thanks for your reply..

Aaron McCarthy said:
Try the cab from this thread ------> Fix for playing ringtones over bluetooth headset.
It's meant so that the actual ringtone you have set will play on the car kit. I know my car kit used to have its own ring which was... boring to say the least. Now the various ring tones set to people on my phone play through the car kit. Anyway... This MIGHT fix the issue you guys are having as well.
Click to expand...
Click to collapse
it did not fix my problem but thanks anyway. The problem im facing is that any contact saved with a name wont be recieved on the car kit. while if its left unnamed it will work fine.

[Q] Bluetooth not working on Galaxy Nexus

Bluetooth appears to be broken on my Galaxy Nexus I can discover other bluetooth devices fine, and they can discover the Nexus, and pairing appears to be successful from either direction. But as soon as I try to connect/transfer a file immediately I get a notification on the Nexus saying 'connection unsuccessful', 'transfer cancelled by user' (when I didn't cancel anything!) etc.
I've tried this with three different devices (my old HTC Desire, my wife's HTC Legend and my MacBook Pro) with the same results on all three.
Has anyone else run into similar problems, or does this sound like I've got a faulty unit and should send it back? Is there anything I can do to troubleshoot this any further? (I've not rooted the phone and its running the stock Android 4 ROM).

I wish I had an answer; just got my Galaxy Nexus yesterday; it won't pair with any of my bluetooth(s) -- they were all working fine in my Droid so I know how to pair. Any suggestions? Help!! Thanks

After further investigation, it seems it's just outgoing connections that don't work on mine. I can transfer files from other devices to the GN fine, just can't transfer from the GN to any other devices. Haven't tried connecting to a headset or anything like that as I don't have one.
I asked an acquaintance who also owns a GN to test it out on theirs and they experienced exactly the same thing - everything works ok except for outgoing connections/transfers.
I'm wondering if its a software bug if that's the case. If it were hardware related you'd have thought the whole bluetooth thing would be broken.

FWIW: I have been able to pair and connect via bluetooth with my car, with no problem. Downloaded my phonebook to my car via bluetooth as well.

Bt phonebook pairing
I'm having BT issues as well with my G-Nex on Verizon. Will connect/pair with my car, works for making/receiving phone call audio, but will not synch the contact list. Thus, cannot use voice dial in my car (Nissan).
Have searched all over the internet, no real answers. Tried to disable the existing bluetooth PBAPservice as suggested somewhere else - no dice, and it just restarts itself anyway. I've seen some suggestion about rooting the phone and replacing the PBAPservice which may be my next step. Hate to root a phone this new when I may end up returning it if I can't make this work ... sorta a deal breaker for me.
Anyone have any suggestions? Could my phone just be defective? Seems like there are a number of BT issues around, but I can't find anything "official" acknowledging the issue(s) ..
Thanks ...

I'm having a problem with my new GNex bluetooth as well. I'm using a Blackberry Stereo Gateway (an A2DP adapter) in my car and it -does- work, but only after I toggle bluetooth off and back on again. That's kinda annoying.
Previously I had been using an Incredible and it was working fine.

Having problems with Bluetooth as well. I have a BlueFusion unit installed in my car. Worked perfectly fine with my Droid X. Every time I got in the car, it just connected and calls and music both played over the stereo fine. Got my Galaxy Nexus paired and it worked great. However, whenever I get back in the car and the Galaxy Nexus reconnects, the audio does not work. It says it's connected, it plays with no audio coming out of the phone or the car speakers though. Tried re-pairing, no go. Tried bluetooth on/off, no go. The only way to get it to work, is to reboot the phone every time I get in the car.

DoubleVision81 said:
...Tried bluetooth on/off, no go. The only way to get it to work, is to reboot the phone every time I get in the car.
Click to expand...
Click to collapse
Okay, I don't feel so bad now. Ouch.
---------- Post added at 02:07 AM ---------- Previous post was at 02:04 AM ----------
cam30era said:
FWIW: I have been able to pair and connect via bluetooth with my car, with no problem. Downloaded my phonebook to my car via bluetooth as well.
Click to expand...
Click to collapse
Does A2DP work properly? And what sort of bluetooth device are you pairing with?

Same here, sending files works, receiving doesn't. Pairing with my bt headset also works fine....
Sent from my Galaxy Nexus using XDA App

mattots said:
Bluetooth appears to be broken on my Galaxy Nexus I can discover other bluetooth devices fine, and they can discover the Nexus, and pairing appears to be successful from either direction. But as soon as I try to connect/transfer a file immediately I get a notification on the Nexus saying 'connection unsuccessful', 'transfer cancelled by user' (when I didn't cancel anything!) etc.
I've tried this with three different devices (my old HTC Desire, my wife's HTC Legend and my MacBook Pro) with the same results on all three.
Has anyone else run into similar problems, or does this sound like I've got a faulty unit and should send it back? Is there anything I can do to troubleshoot this any further? (I've not rooted the phone and its running the stock Android 4 ROM).
Click to expand...
Click to collapse
I had this problem when I fist boot the Nexus and after the first boot of the update to 4.0.1. Reboot the phone, re-pairing the devices and everything is fine since then.
Sent from my GT-P7300

I can't even get my Nexus to pair with my car (Kufatec FISCON unit for Volkswagen). Just straight up error "unable to pair" when I try it. :/

And I have a problem as well. I did get it to pair with my PC but I can't send any files from my PC to Nexus (it works fine with Desire).

I have two Nexus (one is my wife's) and both car have Blackberry Bluetooth Gateways in them. In both cases I am seeing the same issue as the OP, the bluetooth will not connect automatically. However if I manually power on the bluetooth on the phone when the gateway is in connecting mode than they will connect. I never had a problem like this with previous phones.
Is there a official way to inform Samsung of this issue?

I'm also having problems with bluetooth on my Galaxy Nexus. I wanted to transfer files via bluetooth from my old Incredible 2 to my new Galaxy Nexus and it just wouldn't work.
Edit: A reboot appears to have fixed the problem.

DoubleVision81 said:
However, whenever I get back in the car and the Galaxy Nexus reconnects, the audio does not work. It says it's connected, it plays with no audio coming out of the phone or the car speakers though. Tried re-pairing, no go. Tried bluetooth on/off, no go. The only way to get it to work, is to reboot the phone every time I get in the car.
Click to expand...
Click to collapse
I have this same issue exactly - and had this issue after a System Update on my Droid Incredible for a few weeks before I ended up buying the Galaxy Nexus. I had hoped the new phone wouldn't have this issue. Anyways, it also seems to happen when I take a phone call.
Scenario: I'm listening to music over bluetooth to my bluetooth audio enabled headunit in my car. I receive a phone call, and toggle the bluetooth off so I can take the call privately over my phone's earpiece. When the call is finished, I toggle the bluetooth back on and the phone will connect - however the music is playing, but no audio comes through the phone nor the speakers of my car.
I started having this -exact- scenario issue when System Updates started rolling out for Droid Incredible, and they added the options for "Phone Audio" and "Media Audio" under the bluetooth options. Before these System Updates, my Droid Incredible had worked perfectly with bluetooth audio in my car.

Bluetooth Phone and Stereo
SnarfvsMaximvs said:
I'm having a problem with my new GNex bluetooth as well. I'm using a Blackberry Stereo Gateway (an A2DP adapter) in my car and it -does- work, but only after I toggle bluetooth off and back on again. That's kinda annoying.
Previously I had been using an Incredible and it was working fine.
Click to expand...
Click to collapse
I am having similar problems with both my car's BT phone and BT audio.The phone through my car gets terrible static until I stop and start Bluetooth again, which is dangerous on the highway.
I hope it can be fixed with a little software update.

I have the same problem with new nexus galaxy, pairs well with car bluetooth audio, can hear a confirmation beep on car speakers but no luck in the phone. It just stays on paired but not connected. It doesnt allow to remove pairing and redo it untill rebooting the device.

I'm also having issues with the bluetooth audio in my car. I pair okay with my Sony Xplod head unit, then when I turn off the car and reconnect, the GN starts playing music through the internal speaker instead of the car speakers.

I'm having the previously mentioned A2DP issue as well. Everything connects fine but occasionally, no audio is heard via the deck in my car. Phone calls via bluetooth work, just no A2DP audio.
For those having this same problem, you can fix issue by toggling airplane mode on and off. This is quicker than rebooting (which also fixes the issue).
This has to be a bug. I'm running 4.01. Anyone having the same issue with 4.02/4.03?

AdamUpNorth said:
I'm having the previously mentioned A2DP issue as well. Everything connects fine but occasionally, no audio is heard via the deck in my car. Phone calls via bluetooth work, just no A2DP audio.
For those having this same problem, you can fix issue by toggling airplane mode on and off. This is quicker than rebooting (which also fixes the issue).
This has to be a bug. I'm running 4.01. Anyone having the same issue with 4.02/4.03?
Click to expand...
Click to collapse
Yes. I just got mine last night...ran some errands today. Paired fine in my car, can make and receive calls through the car's audio system, but no sound. I'm running 4.02. Tried this with my BT headphones and the same thing happens.
The airplane mode trick works, however. Thanks!
Hopefully this will get fixed rather quickly!

[Q] Car Bluetooth Audio Problem

I have a LG Nitro HD running on AT&T. The phone came pre-loaded with 2.3.5. The bluetooth phone part works as I can make and receive calls with my car (Suzuki Kizoshi 2010), but the audio over bluetooth doesn't work. The phone part works as I can make and receive calls. This is very important for me to be able to play the audio over bluetooth as I have a long commute to work and like to listen to my music. Any help is greatly appreciated. Thank You.

It's been about a month and still no solution. Has anyone else come across this problem?

I do not have this problem. I have a Pioneer X930BT headunit in my car and my Nitro streams audio over bluetooth (A2DP) to it perfectly as well as phone calls.

Have you tried streaming Sirius or spotify over bluetooth? I found that the only app on the phone that streams audio to my car correctly is the pre-installed audio app that comes with the phone.

I can confirm google music and napster stream great over bluetooth. I have not used spotify or sirius for android.

Are you sure your car supports audio profile?
I stream spotify, tunein radio every day through bluetooth.
Spotify actually pauses when bluetooth connection is lost which is great for getting out of the car. I wish TuneIn would do it.
Sent from my LG-P930 using Tapatalk

I have had the same problem with my nitro, it will automatically connect the phone but the media (A2DP) seems to drop automatically after connection. I've found if I manually re-connect to the receiver both will stay connected.
(settings > Wireless & Network > Bluetooth settings > *tap device name*)
I, like you, use it every time I'm in the car so it's annoying but it's a fix until there is a valid solution like a update or properly built rom.

In your case I would delete all the phone profiles from the car memory and re pair them. A lot of cars have a seperate a2dp profile for streaming music and if you pair them seperately the car stereo thinks that it needs to be paired only with the cell phone while the phone says that is paired with phone and audio.
It is not a LG Nitro 4g issue. Updates/firmware would not fix it.

theoski said:
In your case I would delete all the phone profiles from the car memory and re pair them. A lot of cars have a seperate a2dp profile for streaming music and if you pair them seperately the car stereo thinks that it needs to be paired only with the cell phone while the phone says that is paired with phone and audio.
It is not a LG Nitro 4g issue. Updates/firmware would not fix it.
Click to expand...
Click to collapse
That seems to be your problem JoTomlin and Kaiser. Before I installed my new headunit in my subaru I had tons of issues with my captivate playing music over bluetooth because the car had seperate profiles for A2DP and handsfree. When I got my new headunit which has a single profile containing both A2DP and handsfree it all worked without headache on the captivate and now the nitro. This is a problem with your car stereo. If its anything like my subarus, it would prefer to connect to handsfree and it would have to physically disconnect handsfree to connect A2DP (I would have to manually connect via the bluetooth menu). I solved it by getting a tunelink bluetooth audio receiver so handsfree would connect to the stereo and to the tunelink at the same time. Eventually I got tired of that and bought a new headunit.

Apparently a lot of people have swapped out their factory Kizashi factory head units for something better. But again, you'll want to bug Suzuki about something like this.

FWIW, I can stream Pandora just fine over a VW headunit with factory bluetooth. I do have to sometimes to a reconnect/pair though.

Has anyone figured out this issue? I stopped using my Nitro for about 5 months and then just recently updated it with 4.0.4, but still have the audio issue. My Samsung Galaxy SII doesn't have this issue. It's frustrating because I really like the Nitro. The Bluetooth audio is a huge issue though. Any help would be greatly appreciated. Thank You.

JoTomlin509 said:
Has anyone figured out this issue? I stopped using my Nitro for about 5 months and then just recently updated it with 4.0.4, but still have the audio issue. My Samsung Galaxy SII doesn't have this issue. It's frustrating because I really like the Nitro. The Bluetooth audio is a huge issue though. Any help would be greatly appreciated. Thank You.
Click to expand...
Click to collapse
Did you factory reset after updating?

Bluetooth is somewhat broken.....

Connects to car automatically only with PHONE mode and have to connect MEDIA manually through settings every single time

kolyan said:
Connects to car automatically only with PHONE mode and have to connect MEDIA manually through settings every single time
Click to expand...
Click to collapse
I have to unpair and repair my Bluetooth headset every single time I use it. (phone audio only). Looks like Samsung really borked up BT.
Thinking about upgrading to MDL this weekend to see if that fixes it.

i dont know about bluetooth with car, but i listen to my bluetooth headphones every day at work for hours and i have had no probs whatsoever with my bluetooth. it paired really easy like too easy and that was it.

I guess thanks for the fact that at least it works manually so in my case its a 100% software issue.

I'm having no issues with phone or media when hooked up to my car.
Sent from my SGH-M919 using Tapatalk 2

RGD622 said:
I'm having no issues with phone or media when hooked up to my car.
Sent from my SGH-M919 using Tapatalk 2
Click to expand...
Click to collapse
Which car or which radio?

kolyan said:
Which car or which radio?
Click to expand...
Click to collapse
I have the same problem with my Denon aftermarket head unit.

My Motorola BT headset pairs ok, but the quality of the audio is so bad to my callers I can't use it. On my S3 it sounded fine. I had to switch to a different headset that's giant and stupid.

kolyan said:
Which car or which radio?
Click to expand...
Click to collapse
2011 Hyundai Sonata

have a jabra headset and its paired excellently 100% of the time
Had minor issues (device based) when it was "paired" to 2 devices.

Use Bluetooth Auto Connect from play store. I was having the same problem except mine connected on to media instead of phone. That app fixed it right up.

Mine will drop connection intermittently to my VW RNS-315 head unit and also drop connection to my Jawbone Icon HD. When it drops the Jawbone I often see a message on the screen that says Bluetooth Sharing has crashed. Not sure if this is as a result of the rooting process or if it's a glitch in the latest firmware. Hoping Samsung will fix and T-Mo will release patch soon.

Have yet to have an issue here with my S4 and my JVC Arsenel (Dont remember which model #, was one of the higher single DIN units a year ago though), use it daily and it connects on its own without issue / hassel both phone and media

I experience the same phone only problem with my Ford Sync system, I have to manually check Media audio, but it pairs both the first tube after unpairing. I'll try the Play Store app and report back today. I will say is nice to see voice control over bluetooth has been fixed in Jelly Bean.
UPDATE: Bluetooth Auto Connect (The first one listed in a Play Store search by Jakub Klos) works flawlessly to connect Phone and Media audio. Thanks @Sym_Link!

No problems with bluetooth here, my Pioneer radio in my Grand Marquis, both audio and phone sync flawlessly. However, my Sony unit in the Saturn, will sync the phone no problem, but I still have to manually check the box to sync with audio.

My experience w/ BT audio has been variable. I have an aftermarket head unit installed on a '05 Acura RSX (JVC-NSX1 - http://www.crutchfield.com/ISEO-rgbtcspd/p_105NSX1/JVC-KW-NSX1.html).
Note: my headunit also utilizes MirrorLink...which is just flippin' awesome.
BT Media audio seems to be very app dependent. I use Grooveshark and Play Music for my day to day listening, and I find that my Grooveshark will auto-play when BT Connects but if I'm going from a fresh power cycle of my automobile to Google Play I have to start the app on my phone prior to accessing the in-dash controls on my head unit.
Other times I can just select in dash controls and it will play Play Music.
Ironically, since the iOS 6.0 update plugging in the GF's iPhone no longer plays audio (freaking Apple). So if she wants to stream media it's only available over BT. Ah, progress!

Bluetooth no audio in Bmw 323i 2010

guys
pixel 3 xl is not playing well with my BMW 323i 2010 bluetooth call system.
When i get a call the ringtone comes through the car speakers. Then when i accept the call there is no more audio through the car audio system.
i tried unpair and reparing and same issue.
my original pixel xl works fine.
any idea? any1 having similar issue?

I have a 2013 328i, and this is the first phone I've had since the Nexus 6 that actually works well with it for music. I always had problems with the Bluetooth freezing.
Sent from my Pixel 3 XL using Tapatalk

sometimes telling the assistant to play music will get it to play nice if it is still paired just not sending audio. but for phone calls, thats weird

Did some troubleshooting today.
So after connecting the call if I manually select phone on the pixel3 and then switch to car audio Bluetooth then it starts working.
But it doesnt start automatically when the call connects.
I will log it with Google and hope for a fix.
Thanks guys.

Try resetting the cache for the Bluetooth app in the app manager in settings (You have to tun on system apps to see it)

2013 BMW 328i, never had an issue with any other phone, seems at random call audio will stop working over Bluetooth in the car and the only remedy is to reboot the phone. Have tried everything with no solution.

jrock60 said:
2013 BMW 328i, never had an issue with any other phone, seems at random call audio will stop working over Bluetooth in the car and the only remedy is to reboot the phone. Have tried everything with no solution.
Click to expand...
Click to collapse
yep, my issue still not fixed and making me crazy.
1 thing i am gonna try today is that disconnecting p3xl from my samsung gear s3 and see how it works while only connected to bmw's audio. if that does not work then i will send this phone back.
it is insane how many software issue this phone has.

Argh, same thing with my 2011 128i. NEVER had a single problem with my Pixel 1 XL, got the 3 XL a few days ago. Today I need to make a call in the car, pair the phone and... no audio. In fact I think it was still playing music, even though it showed "Connected". I have the "Professional" audio system; ie: the simple one. Not with the big display etc, iDrive I think it is.
Could you let me know the bug ID you logged and I'll star it and participate in it with logs etc as they request them? I don't make a lot of calls in the car but I often drive into work listening to conference calls so this is seriously annoying.
My two bluetooth headsets work fine, so it doesn't appear to be a overall issue with bluetooth headset audio etc. I might try it in my wifes car just to see if it works there, for more datapoints too.
Very, very odd... I read a suggestion to boot into safe mode and connect the phone to the car and that worked, everything is fine now. What's stranger, to me anyway, is that it continues to work fine! But as odd as it sounds, this is something to try.