I posted a video about the same issue with the 4 steps to resolve iPhone bluetooth issues for phone calls in a Model S. Hope you find this helpful!
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Sorry but that simply is not possible. I have several devices that work perfectly well with both X and XS Max. Little, tiny things that cost a paltry sum compared to what the Model S cost. Oh, and a nine-year-old Lexus, too. It is both inconceivable and unforgivable that I should have ANY trouble syncing the Tesla to the phone(s) and yet it's a constant source of aggravation. No one here has provided a solution, nor have the people at the SC. It is a TESLA problem.
AronAZ
Member
FWIW - I have the older MCU but I’ve noticed a correlation between WiFi and Bluetooth issues. When mine glitches, I turn off BT on my iPhone then turn off WiFi on the car, then turn BT back on my phone.
If I have phone music source selected on the MCU, then I first bring my music app (whatever it is, Music/Spotify/SiriusXM) to be the active app and let it handshake to whatever web service it needs to then I turn BT on from the phone control panel. Has worked pretty much every time for me.
Edit: I think some devices use the same chipset/antennas for BT and 2ghz WiFi since they run on the same band. I can easily see some conflict the software is not reconciling.
If I have phone music source selected on the MCU, then I first bring my music app (whatever it is, Music/Spotify/SiriusXM) to be the active app and let it handshake to whatever web service it needs to then I turn BT on from the phone control panel. Has worked pretty much every time for me.
Edit: I think some devices use the same chipset/antennas for BT and 2ghz WiFi since they run on the same band. I can easily see some conflict the software is not reconciling.
analRaviOli
Member
I have had zero issues with my X and now my XS max on my phones up until 12.1.2 got released. As soon as i downloaded it to the car and updated i started to see bluetooth restart issues. I know its the Software on the car ( im a software engineer ) as the bluetooth radio status goes away as its restarting its radio. Once this occurs, the audio resumes and everything is normal. I have seen this a few times already.
JPoldo
Member
Based on evidence in these threads, this engineer feels problem is a combination of hardware and software. It primarily occurs on MCU2 as very few owners report same problem on MCU1. My MCU1 / iPhone X (and others) work flawlessly for phone calls, however theres no music stored on phone.
Hands free calling is a requirement in many states so its shocking to see Tesla engineers not prioritizing a fix. I have to believe Tesla engineers read this forum.
analRaviOli
Member
I have friends who left my company and moved to California companies and one of them is Tesla. I still keep in touch and i get the ins and outs of SW being developed. I personally think its more software than H/W. H/W spec has been validated already for performance. Its the S/W that needs to be tuned and checked against the Product requirement spec. I know for a fact that their engineering development team does not have a proper life cycle set up. They release daily builds constantly without a proper validation. They should be focusing on big releases such as the way Apple, my company and others do. This little bits here or there does not help.
JPoldo
Member
AnalRaviOli,
Well said ! Tesla S/W validation is weak. Decades ago, I did validation and took pride in the discovery of catching bugs. Zero defects should be the goal.
analRaviOli
Member
Agreed. The engineering department is not run at optimal way at all. Daily builds are good for fixing and releasing SW deliverables, but the validation is weak and non existant. I made this concern to my buddy and he said i was bang on as i can tell these obvious issues were not being validated at all. He confirmed to me that their test plans are old and not updated ( key word wise ) for recent SW and display changes that they made. Some testers PASS test cases without proper expectation of the newly updated UI and features.
Samsung phone (Android). Same problem. Regularly requires the two thumb wheel reset.Unbelievable all the problems iPhones have with Tesla. All the Tesla engineers must use Android.
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