I bought BV8000 pro for a week only and ASAP I noticed the bluetooth issue everyone have... So I googled and found you!
Well, after reading ALL this topic, I still have problem with Samsung Gear S3 Frontier disconnections... It now is more stable, but, for sure, the modification made by BV into stock ROM is the problem... Why a high power and balanced mode option? I have no manual to understand the difference of what each one can do to system! A balanced mode means lower CPU or more battery optimization? And inteligent battery mode? (sorry If I wrote wrong, but in portuguese is modo de economia inteligente) Isnt android's stock one enough? So, I have do disable all bluetooth apps from battery optimization, disable inteligent mode, etc, etc...
Well, I have Mi Band 2 and Gear S3. Mi band 2 all the time with me, even when sleeping. Gear S3 when I woke up I use it whole day.
But I shutdown the cellphone at night. When I turn it on, at the morning, Bluetooth is DISABLED ... Why???? Every other settings I did is there, but bluetooth no... If i enable it, I would like to have it the same way after turning off and on... this is natural, don't you think?
I also noticed that mi band 2 has a persistent icon at status bar that remember us that it is connected.. If I click CLEAR ALL messages, it still there. That's ok. But the Samsung S Plugin (from Gear S3) message disappears after cleaning the status bar messages, which I understand that somehow a part of the Gear S3 app was killed... Maybe, and only maybe that can cause the disconnection...
So, if it is not enough to disable android stock battery optimization to all those services, and disable your proprietary mode too, and put cell into its high performance mode, I still have to whitelist all Samsung gear apps, even without 100% sure that it will stop disconnections?
I hope android Oreo will not be so intrusive into those android settings... please, don't understand me wrong... I only thing all these mods are the real problem of bluetooth issues...
Thank you for your time and I apologize if , somehow, i did not make me clear (i would like to write in portuguese, to avoid bad word translations)
PS. I will now search forum to find a way to sort apps using laucher 3...
I'll sum up, again, what to do to solve bluetooth issues. Read and apply each step carefully!0) Consider updating your device to the latest firmware and performing a factory reset after that
1) Go to "Settings" -> "Background task clear" and whitelist all your 3rd party apps wich need bluetooth to transfer data
(i.e. samsung gear app, veryfit app and so on..). By doing that, they will be allowed to run in background even if the smartphone is in deep sleep state.
2) Go to "Settings" -> "Battery" -> "3 dots" in the upper right corner -> "Battery optimization" -> select "All apps" from the dropdown menu and disable battery optimization for every bluetooth service app, as
- Bluetooth MIDI service
- BT Tool
- Bluetooth sharing
and for every app needing to use bluetooth to transmit data, as
- Phone services
- Call management
- Phone/Messaging storage
- your 3rd party music player
- other telephone dialer apps
- fitness band apps and so on
3) Only if the previous steps doesn't solve your issue, ALSO:
- go to "Settings" -> "Battery" and disable "Standby intelligent power saving"
- Go to "Settings" -> "Duraspeed" and and disable it.
4) Only if, again, the previous steps still don't solve your issue, ALSO
go to "Settings" -> "Battery" and set your device into "High performance mode"
Please follow these steps carefully and report back if your bluetooth issue gets solved