Bluetooth call issues - Sony Xperia Z Ultra

Phone connects with my car fine and also does audio streaming fine. However, sometimes when I make calls from my phone it pauses the music from my car stereo but the call doesn't get transferred over to the cars hands free. I notice when that happens, the bluetooth icon in the phone app changes to a phone with wifi marks instead of a bluetooth logo.
Anyone else experiencing this? I have this issue even with the latest .475

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Bluetooth Audio Issue - goes silent after few app switches

Hi,
I've the Prime with 9.4.2.21.
Two days I got a bluetooth speaker (creative d3x) which works pretty fine with the prime. The pairing works fine and the playback as well. But after a few app switches (for example spotify, to youtube, to vimeo app or something like this) Audio stops playing via Bluetooth. If I reconnect again successfully I don't get any sound to the speaker...bluetooth speaker and internal speaker stay silent, although I've the volume turned up. If I connect then with my nexus to the speaker everything it's fine - so it must be an issue with the prime.
Is this any common issue which might get fixed with the upcoming issue? It's really annoying since even turning bluetooth off and on or re-pairing doesn't help. I always have to reboot the prime to get bluetooth audio output working again.
Leif

Problems pairing RAZR bluetooth with Alpine stereo

Droid RAZR Maxx, stock ROM, rooted.
I recently installed an Alpine CDE-HD137BT stereo in my car, which has quite a bit of bluetooth functionality. However, I do have quite a few issues connecting my Razr's BT with the Alpine.
-Sometimes the BT icon on the stereo will light up, and the BT icon on the RAZR will turn blue, indicating that they are paired. However, even though they showing as being paired and connected, it occassionally won't play any audio through the stereo (in fact, the audio will play through the RAZR's speaker). This some times happens with CALLS as well.
-Sometimes the two devices will connect fine, which then automatically causes my phone to start playing music from whatever music app was being used last; the music will play fine through the car stereo's speakers for maybe 20 seconds, followed by a shrill, loud, high frequency tone that only goes away by switching the source or by turning the radio off/on (by turning the car off/on).
-Sometimes the phone will pair perfectly to the stereo, and I make a call before listening to any music. The call is executed beautifully, but then following the call, audio will not stream through the stereo, nor will any subsequent calls work via bluetooth.
-(known problem) the specific Pandora fucntions on the stereo do not seem to work with this device.
Anyone else have the above issues? If so, what did you do to remedy them?
Thanks in advance!
never had those problems before but I now how pissy bluetooth between phones and radios can be, I had a pioneer AVIC D-3 with the BTB-200 bluetooth module. When I first got it I had to manually pair it each time and the problem was that when setting up the pairing I had to have the radio discover the phone instead of the phone discovering the radio or vice versa I can't remember but that solved almost all of the problems I had then, every once in a blue moon my current radio doesn't auto pair, but its not a huge deal as this one doesn't do A2DP audio streaming it only does the Hand Free Profile and text message alerts.

Car Bluetooth issues - No voice on calls unless switching to phone speaker and back

Hi, I have a problem with my Mate 10 Pro. Every time I use my car's Bluetooth, I can't hear voice on incoming calls unless I switch to the phone speaker and then again to the Bluetooth system. The same goes for music as sometimes it switches randomly to the phone speaker and then I have to disconnect a2dp in my car and connect again. This is really annoying and frustrating. Any ideas how to solve this? Never had any Bluetooth problems with my previous phones.

Bluetooth randomly disconnects

I'm having a couple bluetooth issues and wondering if anyone else has seen something similar.
1. Bluetooth disconnects completely from car. I can then reconnect just fine, but it happens frequently
2. Bluetooth stays connected, but the audio starts coming out of the phone instead of my car speakers. While this is happening, I can still control the tracks from my car.
I already tried a factory restore, no luck.

BT Issues during calls

Hi Guys,
My S9+ has some really weird Bluetooth issues during phone calls. Sometimes, the person on the other end sounds robotic (like a Dalek) but if I switch to speaker phone and back to BT it is fine. Other times, I get the most horrendous noise after a few minutes on the phone and again this disappears when I switch to speaker phone and back to BT.
I use Bose BT headphones, this does not happen with other devices. I’ve done multiple software updates etc and I’m at a loss as it is really frustrating! Does anybody have any ideas?
Currently running latest Pie firmwire but has been same since new.
Kind Regards,
Chris
When I listen music (Spotify or Youtube music), it get glitches if I use BT, but if I connect the wire I can listen without problems.
It's a Sennheiser 4.50BT

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