Different Bluetooth stack available? - ZTE Axon 7 Questions & Answers

So when connecting to my main car I get no phone but media does play. Other cars it's 50/50 if I get whole phone or just media.
While researching I found that oplus3t had this issues with certain ROMs and sometime made a flashable zip that changed the bt stack. Was wondering if that existed for the axon7. I know it worked with my car with stock, hate stock though.

I don't know about a different Bluetooth stack, but I've tried every ROM on this forum. The only one that has fully functional BT for me is NucleaROM.

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Bluetooth pairing problems with all 2.1 ROMs.

So I've had this issue since the first Eris leaked ROMs. Basically, any 2.1 ROMs I've tried, INCLUDING what I'm running now, DC 2.07.2
When I turn on bluetooth, and then try to pair my headset, I get a popup saying:
Code:
To pair with "Motoroal H270",
confirm that it is showing the
passkey: 001328.
{Pair} {Don't pair}
The numbers that show up for the passkey are always different, but always 6 digits. I'm assuming the phone is not registering the correct profile for my headset.
Of course, it never pairs.
In 1.5 ROMs I simply entered 0000 as the passkey, but I do not get that option.
I've searched, but with limited keywords to search for... let's just say the hundreds of posts are a little difficult to filter through.
Is that an older Motorola Bluetooth?
I've paired the Motorola H720 with the leaked Eris. Smooth like butter. All I did was enter "0000." Worked fine. Try another bluetooth device, possibly one of more recent vintage. (Don't know how old a model your 270? is.)
I have not had any problems with my Clarion car stereo or my plantronics headset. In my car, in fact, the 2.1's have worked better than stock, since my car stereo picks up the phone and streams the audio automatically every time I get into the car without having to delete and re-pair (as I had to do with stock).
Pete
I have had no luck pairing my phone and any of my cars with any ROM based on 2.1. It pairs, but will not stay connected. Phone says "paired but not connected"; car says "paired, connected; then disconnected"; then endless loops of connected/disconnected. Sucks!
The sad thing is it seems most of these amazing ROM cookers do not use BlueTooth so it is not something they worry about. I bet this is what is holding up releasing the official Sprint update.
I too have tried searching through endless posts about bluetooth and 2.1. All I can come up with is there are some libraries missing from the 2.1 BlueZ; or something to that effect.
I love Damage's 2.0.7.2 ROM! But I have to go back to stock since driving and talking on the phone without a handsfree device is now illegal here in El Paso, TX.
I don't have a car or stereo bluetooth device to pair against. Just tried pairing my bluetooth with the new 2.0.2v2? Alysious ROM. Took 2 sec and nearly totally automatic. Amazing.
My issue with all 2.1 roms is that I can pair, dial and audio stream all day. I just cant talk as no sound or mic. I reflash back to 1.5 and all works well. BT in the car is now useless. sigh
2.1 paired fine, but its a crappy connection on 2.1, on 1.5 i had a better connection
finally used my BT last night with my phone ...worked like a champ! everything was clear to me....i don't have no sound probs and haven't used any of the fixes...
I pair with my bluetooth headset most of the time without problem. I do occasionally have to turn on and off my headset and the bluetooth on the phone to get it to reconnect. Thankfully, it only happens occasionally.....
Maybe I'm just one of the lucky ones (this time) but I have been streaming audio from my hero to the car stereo while while using google navigtion, which politely talks over the music, and have not had any problems. I'll get an occasional skip in the music (probably during downloads of map data), but nothing worth complaining about.
Pete
poor_red_neck said:
So I've had this issue since the first Eris leaked ROMs. Basically, any 2.1 ROMs I've tried, INCLUDING what I'm running now, DC 2.07.2
When I turn on bluetooth, and then try to pair my headset, I get a popup saying:
Code:
To pair with "Motoroal H270",
confirm that it is showing the
passkey: 001328.
{Pair} {Don't pair}
The numbers that show up for the passkey are always different, but always 6 digits. I'm assuming the phone is not registering the correct profile for my headset.
Of course, it never pairs.
In 1.5 ROMs I simply entered 0000 as the passkey, but I do not get that option.
I've searched, but with limited keywords to search for... let's just say the hundreds of posts are a little difficult to filter through.
Click to expand...
Click to collapse
Guys, sorry to revive an old post but I am having this exact same issue as the OP. If anyone has found a fix, please post. Thanks.
Looking at FroYo they have updated some Bluez stuff (what makes out BT work) maybe it will be better when we get that.
Hopefully...

Bluetooth A2DP issues w/ 2.1

So, I have searched all over these forums, and cannot find a difinitive answer or solution. I have problems with A2DP when connecting w/ the BT in my car, since installing a 2.1 ROM (currently DC 2.09.01). When connected, the music plays about twice as fast as it should, then slows down, then speeds up again. Conversley, Android 1.5 worked fine. There has been a lot of talk of BT issues, but it doesn't appear there are any solutions. Am I correct, or has someone found a solution? THanks.
ZenEXP works if you dont mind switching.
I have had those problems occasionally with all 2.1 ROMs I have tried. Usually, if I pause and then unpause it solves the problem. Sometimes I have to do it more than once.
I'm currently running ZenEXP and I've had the problem a few times, but it has been significantly less than with other ROMs. However, AVRCP hasn't been working with ZenEXP, whereas it has worked on other 2.1 ROMs, such as DC.
So, with the unrooted stock Sprint 2.1 software, A2DP works?
The Darchdroid ROM actually fixes this problem! I had the exact same problem as you with playing audio in my 2010 Mazda 3 and Darchstar's ROM fixed it for me, it's the only ROM I have found so far that fixes the bluetooth
I have a problem with my bluetooth headset when I'm playing music, the music stutters alot, I almost have to hold my phone a certain way with very little movement in order for it to play decently. Any solutions on that problem?
I have a problem with my bluetooth headset when I'm playing music, the music stutters alot, I almost have to hold my phone a certain way with very little movement in order for it to play decently. Any solutions on that problem?
Click to expand...
Click to collapse
Turn off/disconnect headset while playing music fixes studdering for me in settings under bluetooth for the connected device. Disconnect the ' phone' while playing. Haven't really tested this on anything but my kenwood head unit.
-------------------------------------
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here's a reply I received from HTC support:
Hello, I understand that you have had issues with your bluetooth since the update for your Hero. With the update, the entire bluetooth stack was updated, and thus some bluetooth devices that previously worked are unfortunately no longer compatible. While we have not heard any information about nor made announcements about any upcoming patches to address this, it is not at all out of the realm of possibility. Otherwise, you may want to try a different bluetooth headset. I do apologize for any inconvenience you may have experienced. If you have any other questions, feel free to contact us again. You can find additional support at support forums at community.htc.com. There is also a customer satisfaction survey for you to take if you are interested. Philip HTC Technical Support www.htc.com www.twitter.com/htc
Bluetooth Stack?
So is it possible for one of the developers on this site to rewrite the bluetooth stack or copy the old one from 1.5 that worked?
I have a Panasonic TH12 bluetooth home phone that worked fine before 2.1. I recently bought an AT&T bluetooth phone and it does the same thing. Will pair but not connect.
aschlect said:
Hello, I understand that you have had issues with your bluetooth since the update for your Hero. With the update, the entire bluetooth stack was updated, and thus some bluetooth devices that previously worked are unfortunately no longer compatible. While we have not heard any information about nor made announcements about any upcoming patches to address this, it is not at all out of the realm of possibility. Otherwise, you may want to try a different bluetooth headset. I do apologize for any inconvenience you may have experienced. If you have any other questions, feel free to contact us again. You can find additional support at support forums at community.htc.com. There is also a customer satisfaction survey for you to take if you are interested. Philip HTC Technical Support www.htc.com www.twitter.com/htc
Click to expand...
Click to collapse
I have to call BS on this. (Not on the post, on the reply)
Why would any company not support legacy hardware as simple as Bluetooth. Especially since most devices aren't even Bluetooth v3/v4 standard yet. And Bluetooth 2.1 is 1. Not very old and 2. What 90% of Bluetooth device still manufactured are! and its been around since 2006!
I honestly can't believe a company is going to just say "Oh its to old" instead of fixing their crap. as far as I know v3/v4 is fully backwards compatible to 2.1 because they include "Classic Bluetooth" protocols!
Not to mention I doubt the hardware in our phone is even capable of v4 stuff. I'll have to do some more research on what BT chip is in the phone. Utter BS.
Either Phillip or HTC is a moron.
CDMA Hero Specs for BT:
Supported Profiles: HSP 1.1, HFP 1.5, A2DP, AVRC, (OPP, PBA)
version 2.0+EDR / possibly upgradeable to 2.1+EDR, plus OPP and PBA profiles
2.1 FULLY backwards compatible to v1. Meaning HTC built the crappiest BT Stack allowable by law to say it includes it. May as well have not bothered.
Someone could probably redo things with AOSP and a newer bluez stack.
Kcarpenter said:
<snip>
2.1 FULLY backwards compatible to v1. Meaning HTC built the crappiest BT Stack allowable by law to say it includes it. May as well have not bothered.
Someone could probably redo things with AOSP and a newer bluez stack.
Click to expand...
Click to collapse
Yeah, I just bought a BT USB adapter so I could exchange files and synch and stuff. I got it to work ONE time and all it did was pass 200 of my contacts to my phone from my PC. Like it was just waiting to upchuck on me. After that, nothing.
There's three hours of my life and $8.99 I'll never get back.
Bluetooth is pretty much the #1 complaint that users have been posting on the Sprint Community Forums (here's the HTC Hero section). Nearly all of those complaints say that Bluetooth now doesn't work at all or just plain sucks on the stock 2.1 Sprint/HTC release. Which probably also means that any ROM here based on 2.1 stock will also suck it up bad with Bluetooth compatibility. Known problem, no one has done anything about it yet. It sounds like AOSP ROMs don't have this issue, so at least that's good.

My Continued Bluetooth Nightmare

OK,
So I'm trying to get some help regarding this issue. I will continue to try different ROM's and what not to see if it can be resolved. I'm simply at a loss to where the issue lies though, however as of today, every custom ROM has been giving me trouble. My plan for today is to flash a stock ROM via Odin and then if that works go for Imperium, however I'm hoping with your help I may be able to solve it on something like CM12 or what not because I prefer the flexibility of a proper custom ROM.
OK, so the issue I have:
I have a car head unit which has bluetooth built-in. Music plays fine through Bluetooth, no jitters or issues. However, when I try and call someone and I'm listening to the radio or something non-Bluetooth, the phone does not send the signal (?) to the head unit to switch to Bluetooth. This means the call will be made via the dialer app and while the audio IS being routed through the bluetooth channel, the head unit does not know about it because it hasn't received the signal to switch to Bluetooth. I can switch it manually to Bluetooth and make and receive calls, but this isn't convenient at all and probably quite dangerous when I'm driving a car. The same applies when receiving a call.
Here's the thing, if I go into Bluetooth, select CAR KIT and go configuration, if I disable Media Audio, then it works fine! The phone correctly sends the signal to switch to Bluetooth and the head unit does so. The call goes through and it all works fine. This is repeatable.
Therefore, the issue I'm having lies in the fact both Media and Phone Audio are enabled at the same time. Has anyone else had this issue and does anyone have a suggestion to fix it?
Before someone suggests "just disable media audio". My answer is no, this isn't convenient at all. I use Bluetooth media quite a lot, and simply disabling and re-enabling it everytime simply isn't an option.
So far, I've had this issue on:
CM12.1 Optimized
CM12.1 Nightly
Mokee ROM
DirtyUnicorns
CM12 Nightly
I'm yet to try a stock Lollipop ROM. I know for a fact however, that stock KitKat DOES work.
I really could do with some help here, so any suggestions would be awesome.
all the roms you have tried are aosp....aosp is not designed for the s4 as its not an officially supported device (its not a nexus) so things like bluetooth and the camera will always be broken as the required stuff needed is proprietary to samsung
go back to stock and your problem will be solved
DSA said:
all the roms you have tried are aosp....aosp is not designed for the s4 as its not an officially supported device (its not a nexus) so things like bluetooth and the camera will always be broken as the required stuff needed is proprietary to samsung
go back to stock and your problem will be solved
Click to expand...
Click to collapse
The Bluetooth itself is fine. Audio quality is fine. Call quality is fine. It just seems like a tiny little thing that's causing all these issues for me, because if it could trigger my car head unit to switch, I wouldn't even dream of stock. Also the camera seems fine to be fair?
I'm not keen on going back to stock.... at all, so I'm thinking Imperium. It's a shame though because apart from this BT issue, CM12 is fantastic on this device. Takes a 2 year old phone and makes it feel like a brand new phone.
I really hope someone can fix that Bluetooth bug in CM12.1. I may even look myself, it must be something pretty small from a coding perspective because as I said, the functionality is clearly there as evidenced by the fact it works with Media audio turned off.
Regardless, thanks anyway
Changing the modem did not solve my problem.
When did you try the Optimized and the nightlies? There have been a lot of fixes lately regarding bluetooth.

ROM that doesn't have Bluetooth audio problems?

I *REALLY* don't want to buy a different phone, but.... I recently swapped out the headunit in my truck from a Clarion to a Kenwood due to phone audio problems with the Clarion. So now the phone over BT with the Kenwood works great but the audio over BT is skipping and breaking up. Seen lots of posts about this being a problem, but no solutions. Sometimes rebooting the phone helps, but not usually. Sometimes forcing Bluetooth Share to close will help, but not usually. I've deleted and re-paired the devices.
I am currently running the stock 6.0 ROM, build 24.49-18, only rooted. The phone says it's up to date.
On to my point... do any of the alternate ROM's seem to have the BT audio issues worked out??
djmasters said:
I *REALLY* don't want to buy a different phone, but.... I recently swapped out the headunit in my truck from a Clarion to a Kenwood due to phone audio problems with the Clarion. So now the phone over BT with the Kenwood works great but the audio over BT is skipping and breaking up. Seen lots of posts about this being a problem, but no solutions. Sometimes rebooting the phone helps, but not usually. Sometimes forcing Bluetooth Share to close will help, but not usually. I've deleted and re-paired the devices.
I am currently running the stock 6.0 ROM, build 24.49-18, only rooted. The phone says it's up to date.
On to my point... do any of the alternate ROM's seem to have the BT audio issues worked out??
Click to expand...
Click to collapse
Answering my own question.....
I ended up trying another ROM, AICP for clark, and so far AVRCP is working fine, it has connected/disconnected several times and has always come back quickly and without any skipping/stuttering. I haven't tried the phone over BT yet. And it's a pretty good ROM beyond that!!!
djmasters said:
Answering my own question.....
I ended up trying another ROM, AICP for clark, and so far AVRCP is working fine, it has connected/disconnected several times and has always come back quickly and without any skipping/stuttering. I haven't tried the phone over BT yet. And it's a pretty good ROM beyond that!!!
Click to expand...
Click to collapse
I was wrong, after a couple of days AICP started doing the same thing. Replaced XT1575 with an HTC 10, I wish the screen was larger but it's a really nice phone!!! And no Bluetooth troubles.
My phone is connected to my car radio any time I'm in the car, and not having this issue. I'm still on 5.1.1 stock but rooted. Headunit is a Alpine CDE-W235BT. I've had it hooked up 5+ hours at a time. No issues with media or phone calls.
Yeah, it works for some but not for others... I think it's more headunit dependent... my Clarion was OK for music but the phone was jacked up. Reverse with my Kenwood, phone OK but audio jacked. Either way, it had to go.....
Factory rom is the only one I can get to work properly with BT in my Mercedes
I haven't tried it on the Moto X Pure, but on the 2nd gen Moto X, Cyanogenmod had infinitely better bluetooth strength than the stock rom, or any other rom I tried. I'm not saying it's the same for the Pure, because they're probably maintained by different people, but worth looking into at least.
Bluetooth usually connects between my Moto X Pure and Mazda3, but there is a 35% chance that when I turn on my car the audio will connect in this really strange manner where tracks skip and the audio sounds horrific. The only solution is to disconnect and reconnect again, which takes another 30 seconds.
Every ROM I have tried on Moto X Pure has had this problem:
Stock, CM13, AICP
It's gotten so annoying that I've decided I am going to sell my Moto X Pure and revert to my Galaxy S4. Never have ANY problems with my old Galaxy.

Bluetooth issue i9505

Dear forum,
really looking for some help with the bluetooth connection and/or some pointers into the right direction.
Before anyone asks, yes I have searched the forum(s) and googled days in a row, tried several builds and found a lot of bluetooth questions/issues but not this specific issue nor a solution.
Have a S4 i9505 which has a perfect bluetooth connection with my Renault Carminat system using the stock rom. As I had other issues with the stock rom, I rooted and upgraded the phone to Optimized LineageOS 14.1 (7.1.2). When pairing the phone to the car, it all works fine (it doesn't disconnect - which is a commonly reported issue). media streaming works fine, the car audio system also responds to the phone (and vice versa), contacts are imported etc. The big issue is however that there is no sound (nor receiving nor sending) when a call is received and/or intitiated.
In my quest to resolve this issue I let the dealer upgrade the firmware of the car audio system, tried with at least two different (but similar) S4 i9505 phones on custom roms, tried several other custom builds (from CM12 to CM14), tried an older but also the latest modem/BL for my region (XXSPQA1), tried some nightly builds but in all cases the exact same issue remains. Only when I go back to the stock rom, I have again a perfect bluetooth connection. A S5 (with stock Android 6) can connect to my system without issues as well.
So my thoughts are that the issue lies within custom roms as even a custom rom based on the same Android version as stock rom doesn't work properly.
Any thoughts what I can do more? Is it possible to copy the BT files from the stock rom and copy it to the custom rom? Any ideas? If it can help to post certain logs I will absolutely do so. Phone is on stock rom again now.
Thank you for your support!
I have exactly the same issue on my I9505, every time i connect to bluetooth (previous car, new car bluetooth speaker calling seems to work , but ther is no sound (only the end of call beep. and also, after disabling bluetooth, the sound is still not working ... i have to reboot my mobile to be able to call again. i hope this issue can be resolved
( when connecting to a bluetooth device for playing media blutooth works )
Same here. I hear a distortion sound when a call is made though. Worked fine with 5.X and broken in 8.0 and 8.1. I tried various modems as well. I even changed codecs in the developer options and didn't find one that worked. i9505

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