Bluetooth connects but no sound - Android Head-Units

Hi,*
I cannot make hands free calls through the HU using Bluetooth. The dialling works but no sound comes through the HU and the person being called cannot hear anything.*I chose MD725 module in factory settings.
A2DP app cannot play music from phone.
Please help.
Sent from my SM-G950F using Tapatalk

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Bluetooth car connection: works, but no sound

Hi everyone,
I picked up my GSIII yesterday (SGH-I747, Bell version from Canada). The phone is a champ, but so far I found fairly serious problem. My car has bluetooth phone functions built in. I paired the phone with it, and it pairs just fine. I can receive and make calls from the car just fine as well, but there is no incoming or outgoing audio. When connected to my car's bluetooth, there is no audio going through my car's speakers or through the phone. It is only when I grab the phone and unclick the "bluetooth headset" button that I can talk on the phone. If I turn "bluetooth headset" back on, there is no sound again. My car worked with my old Blackberry 8330, so the car is fine. It's a 2009 Mercedes-Benz B200, fully loaded, Canadian spec. It has the AUDIO 20 system built in.
My phone specs are as follows:
-stock ROM, not rooted or anything (do we have root yet?)
-Baseband: I747MVLLE8
-Build: IMM76D-I747MVLLE8
The GSII seemed to have the same problem when it came out and it was fixed with a firmware update (http://samsunggalaxysforums.com/showthread.php/5212-Speaker-and-mic-problem-when-calling-someone.)
Anyone have any ideas? Thanks!
Did u by any chance turned down the volume on the phone?
Sent from my SPH-L710 using xda app-developers app
Bluetooth worked fine in my car. Made a call. And they could hear me and I heard them. This with a Kenwood hdx6980
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Yeah Bluetooth works on my CD player also
Sent from my SPH-L710 using xda app-developers app
after pairing did you go into the bluetooth setting for the paired device (car) and check the "call audio" box?
martyzidek said:
Did u by any chance turned down the volume on the phone?
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Nope, I checked the volume and everything is turned up the way it's supposed to be.
faulkton said:
after pairing did you go into the bluetooth setting for the paired device (car) and check the "call audio" box?
Click to expand...
Click to collapse
Yep. It's checked. Moreover, if I uncheck it, the car doesn't connect to the phone.
I'll check my calling this morning, but yesterday I had streaming audio via bluetooth (audible playing a book). The only thing I noticed was that, unlike my old myTouch 4g running CM7, the book didn't stop playing when I turned the car off. That's something I'll have to work out.
EDIT - it's only audible that gives me a problem - looks like a specific app issue.
I'll l have to check if my calls work. All my music and podcast work good. They stop when the car turns off and starts up again when I start the car the next day.
Edit: Just tried it out and incoming and outgoing call sounds work great. No issues here.
Sent from my SPH-L710 using xda app-developers app
I have absolutely no issues with incoming and outgoing calls through Bluetooth in my car. Also, I have no issues playing music through Bluetooth. Possibly try a factory reset on your phone and try again...
It sounds like all your cars support A2DP for playing music. Mine doesn't, it just acts as an old-school bluetooth headset. Can that make a difference?
Mine plays perfectly using Googles Play Music streaming service, also calls work fine, too. This is on my Dodge's U-Connect.
Update: I tried with an old jawbone headset to see if it's a general Bluetooth problem or just specific to my car. The jawbone works like a charm, so it's not a problem with Bluetooth versions or anything like that. But I did notice something interesting: in the Bluetooth options in the gs3 the jawbone comes up with a picture of a phone handset beside it whereas the car has a picture of headphones. I think that's the problem: the phone recognized the wrong Bluetooth profile. I can't seem to delete th car off the list of Bluetooth devices. This is rreally irritating. Any suggestions (short of a total reset)? Thanks!
You might see if there's an update for your car's Bluetooth... if so that might fix your issue.
Sent from my SGH-T999 using Tapatalk 2
No go so far. I'll have to try a reset, otherwise wait for an update or some custom ROMs.
Update: I still haven't done the reset, but I went to the Mercedes dealer today. They told me (after almost a day of investigating) that Germany said that the GSIII is forever incompatible with the B200. I think that's pretty dumb because the problem is clearly software, but the dealer seems to be washing its hands of this matter.

[Q] Bluetooth problems

Any of you guys experiencing problems with your bluetooth? My phone connects to the car with no problems but no sound comes out from my car's speaker during voice calls. The speaker produces sounds whenever I receive calls(rings), but no audio output is produced once I answer the call. I updated the phone to the latest firmware, but the problem is still persistent. Any feedbacks will be much appreciated.
Sent from my GT-I9505 using Tapatalk 2
Search the forum...
Anyway try to enter the settings on the phone for the specific bt device once connceted. There are two checkboxes. One for media and one for phone. Make sure both are checked.
I have various problems with bt too...
I noticed that when the carkit initiates the bt connection its always media only and I have to check the phone myself manually.
Also if on a call and another call waiting incoming call the bt connection drops.
Sent from my GT-I9505 using xda app-developers app
Thanks for the reply, but I also did that prior to posting my dilemma. Even if the car audio is ticked, no sound comes from the speakers during voice calls.
Sent from my GT-I9505 using Tapatalk 2
Hi,
all I can say is bad luck.
I have the same problem.
no voice at all during the call by using my Bluetooth.
I have spend 10 hours to search the solution, no luck.
I think the only way to fix it is either to wait Samsung update or root your phone, get the new ROM.
Jordan Xu
I flashed my 19505 to omega, but unfortunately, my problem still persists
Sent from my Omega 19505
Just an update, my bluetooth works with the latest mea update
Sent from my Omega GT-19505

No voice on GPS while on Bluetooth

I have a strange situation here. My GPS will only read aloud when I am NOT connected to Bluetooth in my car. If I am connected to bluetooth while on the phone but not actually using the Bluetooth, using the handset to talk on the phone, the GPS voice comes through the earpiece on the phone. The GPS voice works fine when I'm not connected to Bluetooth in my car. Does anybody else have this problem? Any solutions? Thanks in advance!
Sent from my SM-G900V using Tapatalk
Ditto!
I too had that problem. I recently was traveling for work and needed GPS in the rental car. I almost missed my exit because the nav voice wasn't working over the car's bluetooth connection. Calls worked fine but not the nav voice....
madhacker7 said:
I too had that problem. I recently was traveling for work and needed GPS in the rental car. I almost missed my exit because the nav voice wasn't working over the car's bluetooth connection. Calls worked fine but not the nav voice....
Click to expand...
Click to collapse
ok good to know that I am not loosing my mind
I have no idea what is causing it tho.
Under Bluetooth settings can you see if you are connected as phone and media or just phone? Every once in a while mine just connects as phone for some strange reason!
kilroy1stcav said:
Under Bluetooth settings can you see if you are connected as phone and media or just phone? Every once in a while mine just connects as phone for some strange reason!
Click to expand...
Click to collapse
You know what....It didn't occur to me to check that. Good call!
Sent from my SM-G900V using XDA Premium 4 mobile app
kilroy1stcav said:
Under Bluetooth settings can you see if you are connected as phone and media or just phone? Every once in a while mine just connects as phone for some strange reason!
Click to expand...
Click to collapse
I will check this too! Was planning on checking it today but we took my husband's car all day, his doesn't have Bluetooth. But I will check that in the morning when I go to work! Thanks!
Sent from my SM-G900V using Tapatalk
kilroy1stcav said:
Under Bluetooth settings can you see if you are connected as phone and media or just phone? Every once in a while mine just connects as phone for some strange reason!
Click to expand...
Click to collapse
Both media and phone was checked off.....hmmmm....not sure why it doesn't work when connected to Bluetooth.
Sent from my SM-G900V using Tapatalk
Ok, today I tried my phone with two different Bluetooth devices to make sure I got music and GPS out at the same time and I did so i know the S5 is capable of it. So check to make sure your devices are actually are connected as phone and media when paired next time just to make sure.I know my Motorola roadster2 sometimes only connects as phone even though it is set up as both, I usually have to reboot both the phone and and my roadster to get it to connect as both fir what ever reason. I hope that helps, if not I am at a loss!
I tested this the other day, and it works fine for me. I am using a Kenwood DNX8120 head unit, and it is connected with the S5 with both the headset and media bluetooth profiles. Note that the head unit needs to be on the bluetooth input for me to hear it since it is using the media profile for the GPS voice. If it is on another input (i.e. tuner, CD), you won't hear the phone's GPS.
Still nothing. I cleared my cars system memory and repaired the phone. The weird thing is that it was working when I got the phone a few weeks ago. It worked for a week, then all of a sudden stopped.
A tad bit late, but here nonetheless
putney1477 said:
Still nothing. I cleared my cars system memory and repaired the phone. The weird thing is that it was working when I got the phone a few weeks ago. It worked for a week, then all of a sudden stopped.
Click to expand...
Click to collapse
I know this is an old thread, but I wonder if you were listening to bluetooth audio or not. If you weren't listening to bluetooth audio on your car radio, then you wouldn't hear the voice navigation prompts. Unfortunately I don't believe voice navigation works like the phone.
The phone will mute any audio currently playing and automatically switch to the phone.
The nav audio works through bluetooth audio only. It doesn't mute anything so unless you are listening to bluetooth audio you won't hear the prompts (they are there, but you aren't listening to the source where they come through).
I think the solution as stated was to turn off Bluetooth media profile so it only comes out of your phone and leave on bluetooth call audio profile so it comes through the car.
bl^5 said:
I know this is an old thread, but I wonder if you were listening to bluetooth audio or not. If you weren't listening to bluetooth audio on your car radio, then you wouldn't hear the voice navigation prompts. Unfortunately I don't believe voice navigation works like the phone.
The phone will mute any audio currently playing and automatically switch to the phone.
The nav audio works through bluetooth audio only. It doesn't mute anything so unless you are listening to bluetooth audio you won't hear the prompts (they are there, but you aren't listening to the source where they come through).
I think the solution as stated was to turn off Bluetooth media profile so it only comes out of your phone and leave on bluetooth call audio profile so it comes through the car.
Click to expand...
Click to collapse
Thank you! I will give thus a try!!!
Try a program in the play store called BTMONO. This worked for me.
Sent from my SM-G900V using XDA Free mobile app

LG-D802 on 5.0.2 no Bluetooth audio (un-rooted)

Hi guys, I've recently discovered that the audio doesn't work over Bluetooth on my phone. I'm on my holls in France at the moment and have been using Google Maps to navigate, along with the bluetooth radio in the hire car. I also couldn't get audio to work with a Bluetooth speaker at home the other day.
I can pair the devices just fine.
Bluetooth audio used to work before the Lollipop update.
Could there be a setting somewhere that I may have missed?
Sent from my LG-D802 using Tapatalk
It looks like I'm the only one with this issue?

Bluetooth issues

Paired my phone with my level on Bluetooth headphones and the audio is very choppy. Didn't experience this on my note 5.
Any ideas? Will try repairing it and see if that helps.
Sent from my SAMSUNG-SM-G935A using Tapatalk
BT audio works great for me.
Useless comment, really, I know.
I have three devices I've used it with (LG HBS-730 headset, MPOW receiver for wired headphones, and the head-unit in my car - VW RCD 310 in my '13 Golf).
Have you tried your phone with other BT audio?
Seems to be working better now.
Sent from my SAMSUNG-SM-G935A using Tapatalk
Works better than nexus 6p with same BT devices. Only had it drop once vs daily on nexus (main reason I sold it). All BT devices can have a little different stack and that includes phones. Unfortunately, BT is hit and miss. Unpair device and boot into recovery and wiping cache. Sometimes that helps.
I have a pair of Samsung level u pro Bluetooth headset paired to my S7E that i bought on friday which when i paired them to the phone they worked fine all day Friday. Now all of a sudden if a contact calls with a custom ringtone the phone plays the ringtone obviously but the headset does not it plays some generic tone at the same time. Any ideas?
Sent from my SM-T810 using Tapatalk
i am getting choppy audio as well did you find a fix with my levels

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