iPhone 15 Pro bluetooth stutter when connected to a car

My iPhone 15 Pro's audio stutters when connected to my car via Bluetooth. When it is connected to my AirPods or Bluetooth speakers, it works fine. I have checked with other phones connected to my car, and they work fine. I tried resetting my phone in DFU mode, but still no luck. I had no issues with iPhone 14 on iOS 17. I guess this issue is specific to the 15 series or just my device? I see other people having the same issue with the same phone and the same car in the car community.


*** The issue persists on iOS 17.1.1 ***

iPhone 15 Pro, iOS 17

Posted on Nov 12, 2023 6:11 PM

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Posted on Mar 28, 2024 7:05 AM

Same Issue here.

Iphone 15 pro with non-apple devices like Sony WH1000, Logitech G435 and VW Golf.

No issues using an iPhone XR or 11, iPad Air 4 and 5, MacBook Pro 2018, Windows PC, etc, etc as active party in the connection.


It is empirically safe to name the iPhone 15 pro as the cause for the issue.

It should be evident that interference is not an issue in a car and the results with the other devices confirm that assumption.

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Mar 28, 2024 7:05 AM in response to GOKORea

Same Issue here.

Iphone 15 pro with non-apple devices like Sony WH1000, Logitech G435 and VW Golf.

No issues using an iPhone XR or 11, iPad Air 4 and 5, MacBook Pro 2018, Windows PC, etc, etc as active party in the connection.


It is empirically safe to name the iPhone 15 pro as the cause for the issue.

It should be evident that interference is not an issue in a car and the results with the other devices confirm that assumption.

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Jul 11, 2024 7:20 AM in response to GOKORea

I guess this is still not fixed. My iPhone 15 and my wife's iPhone 14 have this issue with our 2022 Toyota Rav4. Car play stops and starts constantly and the head unit reboots randomly. Never had this issue with our old iPhone XS. We both are running the latest ios 17.5.1.

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Jul 21, 2024 1:14 AM in response to GOKORea

Same issue with recently bought iPhone 14 pro while my old XS works absolutely fine. iOS 17.5.1 in both devices. What is going on? Is it a phone device issue or car system issue? I have no issues with sound on my Airpods.

Has anyone of u got this resolved and how?

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Nov 13, 2023 12:52 AM in response to GOKORea

Bluetooth interference can potentially cause connectivity issues due to the disruption of the wireless communication between devices. Bluetooth operates in the 2.4 GHz frequency range, which is also used by various other devices such as Wi-Fi routers, microwaves, cordless phones, and even some baby monitors. When multiple devices are operating in close proximity and using the same frequency band, interference can occur.


Here's how Bluetooth interference can impact connectivity:


  1. Audio Streaming Interruptions: When you're streaming music via Apple Music or using Siri to play audio content, Bluetooth interference can disrupt the connection between your device (such as an iPhone) and the Bluetooth speaker or headphones. This interference can result in the audio stuttering, dropping out momentarily, or experiencing poor sound quality.
  2. Bluetooth devices transmit data in packets. Interference can cause some of these packets to be lost or corrupted during transmission. As a result, the receiving device may have trouble decoding the audio or Siri commands correctly, leading to stuttering or delayed responses.
  3. Bluetooth signals can be weakened by interference from other devices operating on the same frequency band. If the signal strength drops significantly, it can affect the stability of the connection between your device and the Bluetooth accessory. This can result in intermittent stuttering as the connection struggles to maintain a consistent data flow.
  4. Bluetooth uses different channels within the 2.4 GHz frequency range to establish connections. When there are many Bluetooth devices in close proximity, multiple connections can create congestion on the available channels. This congestion can cause interference, leading to degraded performance for Apple Music streaming or Siri interactions.


To mitigate Bluetooth interference issues and reduce stuttering:


  1. Minimize the number of active Bluetooth devices in close proximity to each other. Switch off or move away devices that are not in use or causing interference.
  2. Increase the distance between your Bluetooth devices (e.g., your iPhone and Bluetooth speaker/headphones) to reduce the impact of interference.
  3. Keep your devices' firmware up to date, including your iPhone and any Bluetooth accessories. Manufacturers often release firmware updates that can improve the performance and stability of Bluetooth connections.
  4. Objects like walls, furniture, or large metal surfaces can obstruct Bluetooth signals and contribute to interference. Ensure a clear line of sight between your devices to optimize signal strength.
  5. Some Bluetooth devices allow you to manually switch to different channels within the 2.4 GHz range. Check the user manual or settings of your Bluetooth accessory to see if you can change channels to find a less congested one.
  6. If your Wi-Fi router supports it, consider using the 5 GHz frequency band for Wi-Fi connections instead of 2.4 GHz. This can reduce potential interference between Bluetooth and Wi-Fi signals.


By implementing these steps, you can help minimize Bluetooth interference and improve the overall performance of Siri's voice.


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Oct 10, 2024 9:03 PM in response to GOKORea

Really glad to see that I’m not the only one with this problem.

For me this started with my iPhone 13 Pro and continued after I upgraded to the iPhone 15 PM. For the record I drive a 2015 Honda CRV. CarPlay isn’t an option for me. I updated my phone to iOS 18 and still had the same problem. It actually seemed worse if that’s possible. Just updated to iOS 18.1 tonight so we’ll see if that does anything though I’m not the least bit hopeful.

I’ve tried so many different “fixes” that don’t actually fix anything. This is definitely an iOS issue that, it seems, Apple is choosing to ignore.

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Oct 7, 2024 8:40 PM in response to DavidH0608

OK, so I tried the steps suggested by Apple support (noted in previous post).


  1. Tried Amazon Music and Pandora and audio still breaks up. This also happens with my AirPods. I've skimmed some of the posts on this issue but don't think anyone else has mentioned a bad bluetooth connection with AirPods (but I may have missed it).
  2. As stated, reset all settings made no difference
  3. Support said it could be an issue with bluetooth firmware and wiping the phone then doing a new phone setup from my MacBook would give me fresh copies of the OS and all the apps. Need to find out if i can then restore settings from a backup. Reset all settings last week and I'm still finding little things like sharing data between health and my workout app that I need to tweak. Also want to reiterate to them that this is a major problem that many users need fixed. Developers should be working to fix this instead of having support suggest processes that don't fix the problem.
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Oct 29, 2024 2:18 PM in response to GOKORea

Lossless audio
Choose to use Apple Lossless audio.
This option is only available if you’re signed in as a subscriber to Apple Music.

I am subscriber to Apple Music. Turning off lossless option did solve my problems with streaming music, podcasts or radio via bluetooth.


If you don’t have this option, you cannot turn it off. Hence this should not be rout cause of your problem.


Sorry.


Overall, in my opinion the issue concern the fact that iPhone tries to send more data than actual bandwidth of the bluetooth connection.


Actual bandwidth may be lower than nominal due to interference with Wifi or other electronic equipment in your car or at home.


Bluetooth bandwidth in older iPhones may simply be lower by default than in new IPhones like 15 or 14, so it matches what your car multimedia can process.


Lowering quality of sound reduces bandwidth required to streamed via Bluetooth. Maybe check, if you can change it in settings of your apps.

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iPhone 15 Pro bluetooth stutter when connected to a car

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