Develop Bugs

Severe Bluetooth issues

Hey guys,
I'm having some pretty bad bluetooth issues, and my searches haven't really found a solution. When I attempt to connect my phone to my car headunit, my headunit shows it's connected and my phone also shows connected. But the audio still comes out of the phone speaker. After a few minutes it will disconnect and reconnect a few times, sometimes only showing headset connected and not media. Eventually the bluetooth just locks up saying "connecting...". If I turn off bluetooth on my phone, the stereo still shows it is connected to a bluetooth device. I tried to "forget" my device and re-paired, and the process seems fine except the phone never asks if I want to share my phonebook, so I assume something behind the scenes is already broken at that point.
This is a very new problem for me, and my bluetooth was working fine with this headunit for months now using numerous different ROMs from GB to JB. I was on AOKP JB build 1 when this started. I tried a full wipe and reflashed the ROM and still had the problem. I have tested this on about five other ICS and JB ROMs and am currently on CM9.1 and the problem is continuing. I also tried a different phone to make sure the problem wasn't my headunit and the other phone worked as expected.
Has anyone else had this problem, or does anyone have any direction for me to fix this? Thanks!

I have a similar problem with aokp jb, when it wasn't present before. The head unit shows my phone audio connects but the media audio does not connect sometimes. I would have to reboot my phone or fully disconnect my phone from the head unit and pair them again.. no real solution but it is slight work around and to say that you're not alone
Sent from my SGH-T989 using xda app-developers app

Teo032 said:
I have a similar problem with aokp jb, when it wasn't present before. The head unit shows my phone audio connects but the media audio does not connect sometimes. I would have to reboot my phone or fully disconnect my phone from the head unit and pair them again.. no real solution but it is slight work around and to say that you're not alone
Sent from my SGH-T989 using xda app-developers app
Click to expand...
Click to collapse
Thanks. I've had to reboot or re-pair in the past every once in awhile, but neither rebooting or re-pairing is fixing the connection anymore. Anyone else had this problem? Are know if there is some sort of log I can find on my phone that might give some clues to why this is happening?

Problem Solved....
I tried my phone in a different vehicle, with a different headunit. No problems at all. I went through my head unit menus and found an option to clear all bluetooth data. I assume this clears all paired device information from the headunit. Everything works perfect now. Phone pairs fast, stays connected, and all functions are perfect. I hope this helps someone at some point.

Bluetooth no longer plays music through headphones, but calls still go through

Hey guys,
So okay, I am having an issue and have not been abe to solve it for a week now. Allow me to start...
I have the sony MDR-1RBT headphones. I've had them since last February and have used them without any problems. Connection, set up, and usage has always been a breeze. Until recently.
I started my day and connected my headphones like usual and it said they were connected. Cool. Went to play music and it played through my phone. Not sure why. Tried to make a call, audio went through bluetooth device. So they say they are connected and playing through the bluetooth device but is clearly is not.
Things I have tried to fix it:
power cycling phone and headphones
disconnecting and reconnecting bluetooth connection
gone into device settings and made sure media was checked for my bluetooth device
researched through the internet
followed what the person on this link suggested: http://forums.androidcentral.com/ge...r-playing-note-2-music-but-does-do-calls.html
The last step, when I tried it it connected! Yay! Then I turned the headphones and bluetooth off and went to turn em on again and it went back to not working. Tried the same method and it didnt work.
I am running on an LG G2 Rooted but not ROM'd. I know the issue is not with my headphones because I tried to connect the device to my Jawbone Jambox and it did not work on that either. I am not sure why it is not working.
I consider myself pretty tech-savvy and I am pretty upset that I haven't been able to figure it out. Let me know what you guys think.

When you go to your phone bluetooth setting with a list of paired devices, do you see 1RBT listed in there as "connected to phone and media audio"? This is very important because it sounds like it's only connected to phone but not media audio.
Do you have any other bt devices you paired up with your phone? Like wireless speaker or another set of headphones? Quite often if you have a few with power, there will be a race condition which one gets connected as media. But since you said music was playing through your phone speaker, I assume there is not conflict with another device. But nevertheless, just delete all your previously paired up devices in Bluetooth list to make sure there is no conflict. Remove 1RBT as well. After you remove everything, reboot the phone, and do a fresh pair up with 1RBT. See if that helps?
Also, try to pair up these headphones with another device, either phone or a tablet to make sure there is no issues with bluetooth radio on your phone. If you have access to another bluetooth device, try to pair it up with your phone to make sure everything is working as expected.
Let me know the results, and we will go from there.

cmonnats23 said:
Hey guys,
So okay, I am having an issue and have not been abe to solve it for a week now. Allow me to start...
I have the sony MDR-1RBT headphones. I've had them since last February and have used them without any problems. Connection, set up, and usage has always been a breeze. Until recently.
I started my day and connected my headphones like usual and it said they were connected. Cool. Went to play music and it played through my phone. Not sure why. Tried to make a call, audio went through bluetooth device. So they say they are connected and playing through the bluetooth device but is clearly is not.
Things I have tried to fix it:
power cycling phone and headphones
disconnecting and reconnecting bluetooth connection
gone into device settings and made sure media was checked for my bluetooth device
researched through the internet
followed what the person on this link suggested: http://forums.androidcentral.com/ge...r-playing-note-2-music-but-does-do-calls.html
The last step, when I tried it it connected! Yay! Then I turned the headphones and bluetooth off and went to turn em on again and it went back to not working. Tried the same method and it didnt work.
I am running on an LG G2 Rooted but not ROM'd. I know the issue is not with my headphones because I tried to connect the device to my Jawbone Jambox and it did not work on that either. I am not sure why it is not working.
I consider myself pretty tech-savvy and I am pretty upset that I haven't been able to figure it out. Let me know what you guys think.
Click to expand...
Click to collapse
I come from the philippines and i have the g3 also. my bluetooth connection was fine it connected to my car and headset but now it only receives calls but does not play music through my bluetooth headphones. when i press the play button on my headset it plays on the device itself. checked under bluetooth setting and call and media and audio was checked.
my device is rooted. i did a factory reset but the problem remains unfixed. please help. i have installed g3 tweaksbox but i dont see any mods that is related to music apps. i dont know what to do. i have considered unrooting and flashing stock rom.

I was having the same problem until I realized the volume on my jawbone itself was turned down.

Vectron's Suggestion Worked For My Bluetooth Headphones
I was heaving the same issue as the OP all morning. My Beats66 Bluetooth headphones were working just fine since I got my Alcatel Idol 4, with Android 6.0.1 (Marshmallow) phone through wireless provider CricKet, just 2 days ago. I primarily purchased the headphones for placing phone calls, just because most Bluetooth headsets I have purchased, and Android phones in general, are too low volume for my impaired hearing to make out. However, I do listen to music on them as well.
This morning as I am exiting a taxi, I hear music coming from my backpack. Somehow, something launched one of my music apps, probably the buttons and screen were activated while items in the backpack pressed against them. The settings said Media and Phone were connected to Beats66, and the phone did come through the headphones only, but the music would only play on the phone's external speakers.
I found this thread from a Google search, and Vector's post was helpful for me. I went to Bluetooth settings and highlighted Beats 66 headphones, then selected "Forget." I rebooted the phone, paired the headphones, and all my music apps play through the headphones now. Lets see how long it lasts right? Since this is a brand new out of the box phone, I did install numerous Apps, all of which want user authentication, permissions, and countless settings and permissions to interact with other Apps and phone hardware. Hopefully with everything getting set up the way I like my phone, (I'm particular about everything, or I just find the phone annoying rather than a tool), I won't make anymore changes that will alter the operating status of the headphones.
Thank you

I am experiencing the exact same issue on my LG G3 with my Skull Candy Wireless headphones. The headphones pair and phone audio works, but Pandora, Google Music and any other streaming audio app plays over the phone speaker. I noticed that I received a Carrier OTA software update on Jan 17, 2017 and am wondering if that is when it may have charged. The only way to resolve it so far has been to clear the BT cache. This is temporary fix as when you attempt to pair again it is back to only phone audio and no music audio.

My headset is not working with music until you turn off the phone audio just to play music. My phone is Lenovo A2010-a and my headset is Nia X2. Please help

cybrslug said:
I am experiencing the exact same issue on my LG G3 with my Skull Candy Wireless headphones. The headphones pair and phone audio works, but Pandora, Google Music and any other streaming audio app plays over the phone speaker. I noticed that I received a Carrier OTA software update on Jan 17, 2017 and am wondering if that is when it may have charged. The only way to resolve it so far has been to clear the BT cache. This is temporary fix as when you attempt to pair again it is back to only phone audio and no music audio.
Click to expand...
Click to collapse
Ever get this resolved? Still having this issue and so far only fix for me has been using Ti Backup to nuke all the bluetooth data, rebooting and then it'll connect fine. I also have Skullcandy BT headphones. Trying my car's BT too to no avail. Same problem. I think this is the same issue: https: //forum.xda-developers.com/lg-g3/help/bluetooth-calls-media-audio-t2837471/page4

I ended up buying an Amazon​ Moto G4 as it is slated to get Android 7.0. I honestly believe it had something to do with the last security update LG pushed out. Since the G3 is not updating I will attempt to root and rom at some point though recent search seem to show the LG G3 can't be rooted.

cybrslug said:
I ended up buying an Amazon​ Moto G4 as it is slated to get Android 7.0. I honestly believe it had something to do with the last security update LG pushed out. Since the G3 is not updating I will attempt to root and rom at some point though recent search seem to show the LG G3 can't be rooted.
Click to expand...
Click to collapse
I rooted mine fine with Kingroot. Get Kingroot, root, install twrp and flash supersu then delete Kingroot. Worked for me at least.
As far as this BT bug with the G3 I don't have anything better than the data wipe workaround so far, so good luck with the Moto.

Thanks guys. I also had the same problem but i restarted my phone and my music is just playing. Yah!!!!!!!!!!

Bluetooth Hell

Hey all,
I recently bought a new Honda Civic and I've been having a lot of problems with the Bluetooth. The connection process is very picky. The car will pair with the phone but the phone won't successfully pair with the car.
The bigger problem, though, is that if I ever reboot my phone, the BT pairing (if it worked) completely disappears when it comes back up. So I'm constantly having to re-pair my phone and go thru all the crap of it wanting to re-import my contacts, etc. It's quite annoying.
My phone worked fine in our Ford Escape. That pairing persisted thru reboots.
I did some researches and shortened the name of the phone from "HTC One M8" to just "HTC" and I'm still having problems.
I've seen in some ROMs mentioning there are BT issues in Lollipop. I've tried a few different ROMs and I've had the same problem with all of them. I'm currently running LeeDroid.
We have a Honda Odyssey as well and my wife's Galaxy S5 works just fine in it, and it's running older version of HondaLink.
So, is this just a Lollipop bug, or an issue with the phone?
Thanks,
Super

Bluetooth Not Connecting - Worked Previously

OK, so I got everything working on my unit back in November. Bluetooth worked fine and connected with my phone and OBD device (OBDLink LX).
Suddenly within the last couple of weeks, it's stopped connecting. I have tried rebooting the radio, unplugging/replugging my bluetooth OBD, unpairing the phone, repairing, etc... Nothing seems to work for more than a few minutes. Sometimes it will work for one trip, but then the next trip it's back to REFUSING to connect to either bluetooth device. Remember - BOTH worked before, and I didn't change anything.
Since it's happening with both my Phone and my OBD device, it appears like it is a fault in the stereo. I really don't want to do a full factory reset as that would entail many hours sitting in the car wasting gas idling while I reinstall/reconfigure EVERYTHING only to not even be sure it won't do this again.
Anybody have any tips on something I can do to fix this? There does not appear to be any kind of "unpair" option in the bluetooth settings on the radio itself. I'm wondering if there's a way I can manually reset just all of the bluetooth settings - blow them away and start over without resetting the whole device.
This is a pretty big deal - one of the #1 reasons I bought this device was for OBD datalogging. If that feature does not work, I will rip it out of my dashboard and ebay it. PERIOD...
Adcice?

Nobody?
I tried changing the bluetooth device name, changing the PIN and re-pairing my devices. They work intermittently, but 90% of the time won't connect, or if they do, they won't stay connected.
This is turning my radio into an expensive piece of garbage...

lotherius said:
I tried changing the bluetooth device name, changing the PIN and re-pairing my devices. They work intermittently, but 90% of the time won't connect, or if they do, they won't stay connected.
Click to expand...
Click to collapse
Try keeping wifi on all the time (even if not actually connected to any network).

themissionimpossible said:
Try keeping wifi on all the time (even if not actually connected to any network).
Click to expand...
Click to collapse
I do have Wifi on all the time. I have an LTE Hotspot I keep in the glovebox of my car that powers up as soon as the car powers on. So there's 100% wifi coverage for my stereo no matter where I'm at.
I can randomly get it to connect, but it won't stay connected. When I'm in the bluetooth menu, the devices will actually disappear from the paired devices list. Both paired and available will go blank just suddenly as the devices drop off. Then they'll reappear on their own. So it appears to be the bluetooth stack is crashing - but I'm not sure why.
It is a KLD RK3188 unit. Running latest MCU (came preloaded, just bought it in November - I haven't put a new MCU) and recent firmware, which is a stock firmware, not MalaySK (MalaySK doesn't support the digital display below the screen on my unit)...

At this point this unit is trash if I can't keep Bluetooth working more than 10% of the time.
Sent from my OnePlus One.

lotherius said:
I can't keep Bluetooth working more than 10% of the time.
Click to expand...
Click to collapse
Some smartphones might show an incompatibility with the radio's BT stack. To be sure try with another smartphone.

I would see if it pairs reliably with just one device at a time. My phone has issues connecting with the HU if I first connect my BT headset to the phone but works fine if I do it after. Also the construction of these seems to be sub-par and it could be the bt device or antenna in yours was not connectec/mounted well and you hit a pothole and now its not attached/broken/loose. It may be worth opening and looking inside for something that broke off or is loose. Finally, I have had (well still have) my factory settings change randomly and have to go in and reset. There are settings in the for BT module and it may be worth looking to see if yours are correct.

I also have problems with mine but I'm running Marshmallow in my OPO. As soon as i go back to Lollipop (CM 12.1) it works again.

stormlabs said:
I also have problems with mine but I'm running Marshmallow in my OPO. As soon as i go back to Lollipop (CM 12.1) it works again.
Click to expand...
Click to collapse
Turns out I think it's the OPO. Mine has issues even with 12.1. I think it's based on Modem version not firmware version. Your modem may have been changed when you went back to 12.1.
For me changing modem versions is something I really want to avoid. I hunted forever for a modem version that didn't constantly drop WiFi and LTE, finally found one, and I think that's when the Bluetooth issues started. Every time I flash a modem to the OPO it becomes a nightmare. That phone really does not want you messing with the firmware which is not what I expected when I bought it.
For now I'm back on my old Nexus 5. No problems. I may just sell the OPO and never stray from Nexus again.
Sent from my Nexus 7 using Tapatalk

Hmmm.
My OPO doesn't connect to the headset but my chinese BT OBD dongle connects fine and works.

I have the same problem with my unit but phone working.Only obd2 adapter some times not connecting.Have you find any solution?

I have a similar issue with the Pixel XL.
Previous I was on a Nexus 5 Bluetooth worked perfectly every time without fail, could make calls, listen to music and sync address book no issue.
Now since moving to the Pixel XL I have an issue connecting to the head unit. The head unit shows as a connected device, but then flashes green then grey, green, grey showing connected, disconnected... I can still stream music from my phone over Bluetooth, but voice is not achievable.
Like suggested it's likely to be the BT stack in the handset rather than the head unit as works fine with Nexus 5. Highly frustrating and likely no fix unless it can be patched by software update

I'm also having the same problem as you noodlemctwoodle on a Nexus 6P with 7.1 developer preview.
I've un-enrolled from the beta program this morning, waiting for the ota to come down, as soon as it does will re-test and let you know if it's working, as I suspect it is a problem with the bluetooth stack in 7.1

MTCD MLT (Xtrons TD618AS) Bluetooth and OBD Reader
I have had issues with the Bluetooth on the MTCD MLT V1.76_1 (Xtrons TD618AS).
I found a work around which allows me to use the OBD reader successfully. I downloaded an Android Bluetooth App and toggled off the Bluetooth. Once the Bluetooth was toggled off I was able to access the OBD reader by using the "Piston" OBD app. I tapped on the car picture and waited for the app to think about things. Once the app finished thinking I was able to start capturing the live OBD data by pressing the play picture. I am only speculating, but I feel as though perhaps the firmware engineers goofed. This is even the OBD reader that Xtrons promoted as compatible with the TD618AS stereo I bought with it at the same time. Not to mention that I continually lose FM radio even though the stereo was professionally installed and no wires were cut. I was very excited, and now only depressed.

mr.hackerly said:
I have had issues with the Bluetooth on the MTCD MLT V1.76_1 (Xtrons TD618AS).
I found a work around which allows me to use the OBD reader successfully. I downloaded an Android Bluetooth App and toggled off the Bluetooth.
Click to expand...
Click to collapse
Which Bluetooth app did you download?

Bluetooth Car Sync Issue

Is anyone else having issues syncing to your car? Mine connects for 5 seconds and then flashes phone not detected on my phone screen and disconnects. I am running the deluxe standard model, not the special edition. I have checked the easy stuff like making sure Bluetooth is enabled and successful pairing. I can connect to Bluetooth speakers no problem. My Google music app also froze and could not be recovered by powering off or closing apps. I had to uninstall and reinstall. Let me know if anyone has had a similar issue and hire or if you fixed it.

I listen to music in my car via A2DP/BT Audio & have no issues with either listening, or controlling (fwd, rewind, etc...) music apps like VLC via the car controls.

no problem pairing with my car, mobile, music etc etc.

dktrwatson said:
Is anyone else having issues syncing to your car? Mine connects for 5 seconds and then flashes phone not detected on my phone screen and disconnects. I am running the deluxe standard model, not the special edition. I have checked the easy stuff like making sure Bluetooth is enabled and successful pairing. I can connect to Bluetooth speakers no problem. My Google music app also froze and could not be recovered by powering off or closing apps. I had to uninstall and reinstall. Let me know if anyone has had a similar issue and hire or if you fixed it.
Click to expand...
Click to collapse
2 ppl confirmed properly working BT;
1: make sure you're on the latest firmware
2: close any other apps which might be using BT (do you have other BT devices on you? They might be conflicting)
3: make sure your music app is whitelisted in battery optimization options
4: try other music apps, like VLC
5: choose balanced power management
6: factory reset & try BT audio as the 1st thing after a fresh boot; this should help you isolate the issue.

Soetimes
dktrwatson said:
Is anyone else having issues syncing to your car? Mine connects for 5 seconds and then flashes phone not detected on my phone screen and disconnects. I am running the deluxe standard model, not the special edition. I have checked the easy stuff like making sure Bluetooth is enabled and successful pairing. I can connect to Bluetooth speakers no problem. My Google music app also froze and could not be recovered by powering off or closing apps. I had to uninstall and reinstall. Let me know if anyone has had a similar issue and hire or if you fixed it.
Click to expand...
Click to collapse
I have the same issue sometimes. My Honda Accord had no issues pairing to my Note 7, and connected to it perfectly every time. The car also initially paired quickly to the ZF3D, but when I get in the car I have to manually select the car in the Bluetooth menu. If I try waiting, it will either never connect, or flash like yours. connect for a second then lose connection.
either way, manually selecting it makes the phone keep its connection throughout the entire drive.
Hope it helps!
Nick

Nicksjohnson said:
I have the same issue sometimes. My Honda Accord had no issues pairing to my Note 7, and connected to it perfectly every time. The car also initially paired quickly to the ZF3D, but when I get in the car I have to manually select the car in the Bluetooth menu. If I try waiting, it will either never connect, or flash like yours. connect for a second then lose connection.
either way, manually selecting it makes the phone keep its connection throughout the entire drive.
Hope it helps!
Nick
Click to expand...
Click to collapse
Thanks all, I tried all of the tips above to no effect. Manually selecting still drops within 5 seconds. Tonight I will try it in a different car to rule out a compatibility issue with mine. I aIso downloaded VLC and made sure everything was white listed. Phone reset had the same issue with no apps installed. My old Note 4 pairs just fine and stays connected. The Buick Bluetooth (2012) system isn't the most up to date either and has limited capability (phone only, no music) so it may be a car issue.
Thanks,
Eric

dktrwatson said:
Thanks all, I tried all of the tips above to no effect. Manually selecting still drops within 5 seconds. Tonight I will try it in a different car to rule out a compatibility issue with mine. I aIso downloaded VLC and made sure everything was white listed. Phone reset had the same issue with no apps installed. My old Note 4 pairs just fine and stays connected. The Buick Bluetooth (2012) system isn't the most up to date either and has limited capability (phone only, no music) so it may be a car issue.
Thanks,
Eric
Click to expand...
Click to collapse
It is a car compatibility issue. It works fine in other cars apparently just not older Buicks. Thanks for the assistance everyone.
Eric

Was this issue ever solved? I have the same problem with my 2013 hyundai i30

sharlene.s said:
Was this issue ever solved? I have the same problem with my 2013 hyundai i30
Click to expand...
Click to collapse
I was never able to pair it with my vehicle even after a reset. It works fine with my other car, and it works fine with everything else I have tried.

dktrwatson said:
I was never able to pair it with my vehicle even after a reset. It works fine with my other car, and it works fine with everything else I have tried.
Click to expand...
Click to collapse
Thanks for the reply....that sucks... looks like that's the end of my zenfone 3 deluxe

Minor issue here but similar
dktrwatson said:
Is anyone else having issues syncing to your car? Mine connects for 5 seconds and then flashes phone not detected on my phone screen and disconnects. I am running the deluxe standard model, not the special edition. I have checked the easy stuff like making sure Bluetooth is enabled and successful pairing. I can connect to Bluetooth speakers no problem. My Google music app also froze and could not be recovered by powering off or closing apps. I had to uninstall and reinstall. Let me know if anyone has had a similar issue and hire or if you fixed it.
Click to expand...
Click to collapse
I am finding that auto connecting to BT in the car and on my Gear S3 is hit and miss, however i have had no issues when doing it manually, but it is a pain in the ass. hopefully ASUS will fix this when they release the nougat update!

My Zenfone 3 will pair with the car and a number comes up that I have to type into the phone but the keypad flashes up on the phone for 1 second and then disappears too quickly to enter it. I have tryed it about 10 times and always the same result. Anyone have any idears on how to fix it.