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[TIP] Improve Audio Quality of Calls or Music Over Bluetooth on the Captivate

I have been having intermittent issues with Bluetooth audio cutting out on my Captivate while I am on a phone call over Bluetooth. I believe the problem stems from Samsung's inability to do anything right and their implementation of Bluetooth 3.0. A new feature of Bluetooth 3.0 is the ability for a Bluetooth connection to transfer data over Wifi if both Bluetooth devices support 3.0 and have compatible Wifi chips. Samsung implemented this poorly, not a real surprise, and now Wifi is causing the Bluetooth data transfers to be spotty causing streaming data, voice calls or audio streaming, to to be adversely affected.
I was able to finally narrow down the problem. I received a phone call yesterday on my cell phone and I picked up the call on my Bluetooth enabled home phone. The call sounded horrible, noise and the other caller was cutting out, but not enough that I couldn't understand the other person, so I continued the call. The person on the other end did not seem to have any idea that the call sounded so badly, so it seemed to be something limited to my end. During the call, I went over to my Captivate and turned off Wifi. Instantly, the call cleared up and the quality was good to excellent.
I use Wifi all of the time especially at home, so I wasn't going to be turning off Wifi all of the time, so I needed a workaround. Using an App called Setting Profiles, I am able to have Wifi automatically turn off anytime I am on a call and then when the call is completed it turns Wifi back on. What's even better is that the app will note the state of Wifi before a call, so if Wifi is already off before a call, it will not turn Wifi on when the call is ended. The Tasker app will allow you to do the same thing, so if you already have Tasker you won't need Setting Profiles.
This tip will probably only work on the Samsung Galaxy S line because these phones use Bluetooth 3.0, where most Android phones use 2.1 or earlier and do not support Bluetooth file transfers over Wifi. I have only experienced it on the Captivate so I can't say if it will work for any other Galaxy S phone.

Since both wi-fi and BT uses the same 2.4Ghz frequency, interference maybe anticipated although new BT hardwares are pretty good at reduce such interferences.
Did you try change your wi-fi router frequency/channel so that it won't interfere with your BT? Try that so that you may not need to turn off wi-fi on the phone at all.

I have had the issue occur in my car while not near any Wifi router. Also, the router was still on when the call quality improved. It's not like the radio waves from the router and three other Wifi devices in my house disappeared around my phone just because I turned off the Wifi on my phone.
Sent from my SAMSUNG-SGH-I897 using XDA App

Thanks for the tip

Call "muted" (both sides) when activating bluetooth during a call

Hello,
since I've upgraded the ROM I am using now (Endymion) to the latest version (3.4) I have a strange problem.
I am opening a new thread because I am not pretty sure it is a ROM related issue (instead it could be a radio related problem, but this has never happened before, with the same radio I am using now). Kernel issue??
The problem is that if I activate the bluetooth and then connect my bluetooth headset, the call is like interrupted so I can't hear the voice of my interlocutor and vice versa for about 10-15 seconds. Then it goes as usual.
I've noticed this issue because I have a Tasker rule which activates the bluetooth if a certain person calls and if I am at home. But this happens even if I activate the bluetooth by hand.
Do you have an idea of what could the cause of this problem be?

I'm sorry, i can't really help you i just can tell you that i'm also on Endymion V3.4 and i often use a Bluetooth headset.
But everything works fine, i have no issues like you.

I often use Bluetooth headset too and the headset is working good for me, but it's the bluetooth activation that makes this problem happen.
Did you try to switch bluetooth ON during a call?
What radio do you use?

Yes i often switch on my Bluetooth headset during a call and I immediately hear the partner in my ear
I have never changed radio, because everything works fine for me (never change a running system).
The second reason is, that i can't flash radio, because I'm S-On. I used HTCDev in case of unlocking the bootloader.

I've actually not had a problem making or receving calls when using a Bluetooth head set.
However i have some time had problems listing to music on the headset when i'm out in public, however i think that might be the headset.
Would changing the radio change that?

Shamz84 said:
I've actually not had a problem making or receving calls when using a Bluetooth head set.
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Again, such sentence tells me I wasn't clear enough.
I've never had a problem making or receiving calls when using a Bluetooth headset too!.
Indeed, the problem occurs when, and only when I activate the bluetooth during a call.

[P5100] Speakerphone problem ??

Hi all
I have a fully unlocked (from purchase) P5100 tablet which has been rooted for openvpn support. I set up a bluetooth headest with it and everything was ok.
After a few days mobile originiated GSM voice is no longer working properly although mobile terminating seems to work fine .
GSM Speakerphone calls ring once on the tablet then go silent. and this is total "audio shut down" silent, no hiss no nothing, the call proceeds but when the call is picked up at the remote (B party) end , there is no voice path either way but DTMF tones can be inserted to line from the keypad.
GSM tablet originated calls made with a stereo headphone (i.e. expecting to listen to the call on headphone using the tablets internal microphone) give the same result as GSM speakerphone
GSM inbound calls to headphones work as expected
VOIP calls route as expected
tried turning off BT and WIFI , rebooting , unpairing the BT headset ...no restoration of audio !!
Well....i'm stumped !!! anyone got any clues ???
regards
CQU

for the record - I have checked the obvious like the "in call" volume was set to maximum not set to "0"

try Reset factory setting

Factory reset hasnt fixed it, going back to supplier as 'not fit for purpose" under the sale of goods act
Specifically wanted a 5100 for gsm voice calling
Regards
CQU

same problem...
Hi, I've got the same issue...
Even after flashing several custom roms I can make between 0 and 2 succesful outgoing gsm phone calls after a reboot.
Maybe anyone knows a radio rom that works properly in the netherlands? I'm hoping that that might solve the issue. Unfortunately, samsung hasn't released a new version for the netherlands yet as far as I know...

Idol 3 Bluetooth + Wifi while driving or changing Wifi

While driving bluetooth stops or some time lag voice if wifi is on. same issue noticed without wifi enable also but very less.
It seems whenever wifi changes to different network or connects or disconnects bluetooth is loosing or lagging voice.
Where as if i put it on speaker i can hear sound from speaker. I tried 5-6 different bluetooth and having same issue. i got replacement of phone also but same issue with new phone also. I could verify with older phone and it seems issue is only with Idol 3. Is any one else facing similar issue?

I tested this using a Bluetooth headset, and I am unable to replicate it. Turning WiFi on and off has no noticeable effect on playback via a the Bluetooth headset. Unfortunately , I have no way to test this while driving .

stl1859 said:
I tested this using a Bluetooth headset, and I am unable to replicate it. Turning WiFi on and off has no noticeable effect on playback via a the Bluetooth headset. Unfortunately , I have no way to test this while driving .
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This issue is mainly happening while driving. It seems like while driving phone tries to goes from LTE to different modes and same with wifi as it tries to connect to different wifi. In this process it starts to lags voice on bluetooth and in few cases sound get disconnected.

Are you listening to music on your phone or streaming?
I haven't had any issues while driving using both Google music and slacker. Those are the only two streaming apps i use tho. I leave my Wi-Fi on all day. My deck is a Bluetooth pioneer unit, though the model number escapes me at the moment. I'm on T-Mobile BTW.

I don't drive anymore but I stream Rhapsody overnight onto my BT speakers and it never has conked out on me yet. There was one time I did lose the BT connection to the speakers before I did the factory reset but no issues with the BT since.

Issue is not with listenting music, it is during call through bluetooth while driving and having wifi and bluetooth both on.

OK I'll test that later on today. How often/with what frequency does it happen to you?

psu2fan said:
OK I'll test that later on today. How often/with what frequency does it happen to you?
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Almost 2 out of 3 attempts i am having this issue. even now in home i started call on bluetooth when wifi was off, then just put wifi one during call and voice from bluetooth started to get blurry and then other party could not hear me. and i had to disable wifi and then disable bluetooth and then on bluetooth again in phone.
Seems like issue is happening when phone is trying to connect to wifi and call is on bluetooth...

airplane mode on, wifi and blutooth on, LG HBS700 oem + netflix = audio lag. firmware update did not help. not ready to switch from s4 just too many quirks.

pepper454 said:
airplane mode on, wifi and blutooth on, LG HBS700 oem + netflix = audio lag. firmware update did not help. not ready to switch from s4 just too many quirks.
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I do not have Netflix - but I tested with HBO Go - and YouTube - with airplane mode , WiFi and Bluetooth - And I am not seeing any audio lag - or audio interruption when switching from speakers to Bluetooth mid session. I am using Arctic P253BT headphones.

Alright I did a call today. It was only 5 minutes long but didn't notice anything. I'll try doing what you did starting a call in my driveway and turn WiFi on/off repeatedly at various time intervals.

I got replacement, but i can still see the issue with new phone also...

attitude_it7 said:
I got replacement, but i can still see the issue with new phone also...
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Sorry, my testing is put on hold as I had to send the device in to get a new screen (cracked). I couldn't get it done before because my wife kept stealing my car

I'm having kinda' the same problem. The thing is everytime I connect/disconnect there's a general lag in the phone! after one minute or so, it starts working ok

jcipactli said:
I'm having kinda' the same problem. The thing is everytime I connect/disconnect there's a general lag in the phone! after one minute or so, it starts working ok
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It's possible the bluetooth is unreliable because the phone gets busy as you indicated...I posted a couple of apps in the idol 3 apps section that help reduce lag and may help this...
Something I've done has made my bluetooth totally unreliable....whether linked to car or home phone system I can answer...talk for a few seconds and then it transfers the call back to the cell instead of the bluetooth device. I'll have to go back through my backups and find a version that doesn't do this.

I have demonstrated the same effect with my bt device (lg). When switching wifi networks bt microphone stop receiving so other party cannot hear me and the audio begins to break up and lag. I can switch off bt then back on and am fine till next wifi switchover. I was hoping the update from Alcatel would address this, was not the case. ;(

I also had the same kind of issue while listening music in car using Bluetooth, strangely it is happening when the WiFi try to connect to open WiFi available. And when that open WiFi is not able give internet accesses, then the phone just get stuck for some time. I have these issues frequently I need to restart my phone

I just purchase Alcatel Onetouch Idol 3 and and am having similar problem. I had a Plantronics M50 connected and people complained that I was breaking up and they couldn't hear me and it happened on my end sometimes too. When I'm calling someone, the ring will be normal at the beginning of the ring and then it will fad out at the end of the ring. Store rep told me this was normal. Has never done it with any of my other phones. Bought another bluetooth to try to determine if it was the bluetooth or the phone. Bought the Plantronics E50 and the same thing happens. Alcatel says it's the bluetooth and Plantronics says it's the phone. Betty at Alcatel also says the Plantronics bluetooth are not compatible with the Alcatel, however, the store sells the Plantronics Marque II to use with the Alcatel. Anyone have any suggestions or having the same problem?

I'm having the problem in car on bluetooth where the caller sounds like they are underwater and garbled and I'm told I do too. It comes and goes, very frustrating. I tested another Android and no problem.

skisom said:
I just purchase Alcatel Onetouch Idol 3 and and am having similar problem. I had a Plantronics M50 connected and people complained that I was breaking up and they couldn't hear me and it happened on my end sometimes too. When I'm calling someone, the ring will be normal at the beginning of the ring and then it will fad out at the end of the ring. Store rep told me this was normal. Has never done it with any of my other phones. Bought another bluetooth to try to determine if it was the bluetooth or the phone. Bought the Plantronics E50 and the same thing happens. Alcatel says it's the bluetooth and Plantronics says it's the phone. Betty at Alcatel also says the Plantronics bluetooth are not compatible with the Alcatel, however, the store sells the Plantronics Marque II to use with the Alcatel. Anyone have any suggestions or having the same problem?
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There's a problem with the phone. It happened after the last Android update. My bluetooth was fine until marshmallow. It's so bad I went back to my Galaxy S4. I loved the Idol for just about everything, but horrible bluetooth. People can't hear you, it's a deal breaker.

Bluetooth headset mic dont work on SIM-2 calls

Today after 3 days of using my new redmi note 7 pro I faced an issue I.e. bluetooth headset mic stopped working for calls on SIM2 only. Otherwise is working fine for SIM1 calls, whatsApp calls, facebook calls etc.
I tried to connect another bluetooth thinking there is some problem with my bluetooth headset but problem remained unchanged with another bluetooth headset too.
Now it is clear that issue is with some settings on phone. Does anybody know abt it. Please help

Same Issue here
Atulverma1979 said:
Today after 3 days of using my new redmi note 7 pro I faced an issue I.e. bluetooth headset mic stopped working for calls on SIM2 only. Otherwise is working fine for SIM1 calls, whatsApp calls, facebook calls etc.
I tried to connect another bluetooth thinking there is some problem with my bluetooth headset but problem remained unchanged with another bluetooth headset too.
Now it is clear that issue is with some settings on phone. Does anybody know abt it. Please help
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Click to collapse
did You get solution?

What ROM have you installed? This issue is present in MIUI 12 ROM and already have this issue raise to the EU Team for resolution about Bluetooth issue in Redmi Note 7 Pro

Same problem here in oppo reno 2
Did you get a solution?