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gal105
User level: Level 1 (4 points)

iPhone 17 Pro Max Bluetooth call audio is unstable in Hyundai i20

Hey,


I have a 2019 Hyundai i20 with the original Hyundai infotainment system (Android 5) and an iPhone 17 pro max.


During Bluetooth calls, the audio is unstable:

  • I can hear the other person cutting out / sounding broken through the car speakers. Sounds a bit like a robotic sound.
  • The other person sometimes hears an extremely loud noise from my side and can barely hear my voice.
  • The noise is intermittent — it can disappear for several seconds and then suddenly come back.
  • When I switch the call to the iPhone speaker, the call is completely clear.
  • Most importantly, I tested the exact same car with my OnePlus 12 and the Bluetooth calls work perfectly. The other person hears me clearly.
  • when playing music, i don’t have any issue with the sound.


I have already:

  • Updated the iPhone to the latest available iOS.
  • Completely forgotten/re-paired the Bluetooth connection.
  • Factory-reset the car’s infotainment system.


None of these fixed the issue.


Does anyone else facing this issue too? Is there a way to fix this?

Posted on Sep 22, 2026 8:47 PM

2 replies

SravanKrA
User level: Level 10 (454,138 points)

Sep 23, 2026 12:51 AM in response to gal105

If CarPlay doesn't detect your iPhone, make sure CarPlay isn't restricted. Go to Settings > Screen Time > Content & Privacy Restrictions. If Content & Privacy Restrictions are turned on, tap Allowed Apps and make sure CarPlay is enabled. Go to Settings > General > CarPlay, tap your car, and then tap Forget This Car.


If you need help with CarPlay - Apple Support (IN)



Search for accessories that have completed MFi certification. Once an accessory has completed MFi certification requirements and is reported to Apple as sold/distributed, it will be searchable in our public database of authorized Lightning, headset, charging, iAP-enabled, and Find My network-enabled accessories.


Learn how to identify counterfeit or uncertified Lightning-based accessories.



On your device, go to Settings > Bluetooth and turn on Bluetooth. Stay on this screen until you've completed the steps to pair your accessory.


Pair a third-party Bluetooth accessory with your iPhone or ...



If you're still having trouble with your car's audio system using CarPlay or Bluetooth, try the Aux cable. To get it fixed, there are two options:


  1. Take your car to a reputable car dealer or car audio specialist. They have experienced technicians who can diagnose the problem with the Aux cable. This could be a loose connection, a faulty cable itself, or an issue with the system's Aux port. They'll be able to repair the issue or recommend a replacement cable if needed.
  2. Consult your car's infotainment system manuals. These manuals often include troubleshooting sections that might address common Aux cable problems. You might find instructions for resetting the system, cleaning the Aux port, or confirming the cable's compatibility.


Before taking your car to a dealer, it's always a good idea to check the manuals first. This can sometimes save you time and money if it's a simple fix you can handle yourself. However, if the manuals don't offer a solution, or you're uncomfortable tinkering with the system, then a car audio specialist is the way to go.



Refer to the list of cars that are compatible with CarPlay --> iOS - CarPlay - Available Models




SravanKrA
User level: Level 10 (454,138 points)

Sep 23, 2026 12:51 AM in response to gal105

Expressing or conveying auditory experiences effectively through these forums may be challenging. The underlying sound issue on your iPhone cannot be accurately diagnosed from a YouTube link. Factors such as your iPhone's specific sound settings, visual defects, and potential hardware problems cannot be assessed through this method. For more personalized and in-depth assistance, I recommend securing a Genius Bar Reservation and exploring the various support options provided by Apple.


Get a Genius Bar Reservation and Apple Support Options - Apple

When you encounter issues with your Apple devices, the Genius Bar at Apple Retail Stores is the go-to place for expert assistance. The Genius Bar is staffed by knowledgeable Apple employees, often referred to as "Geniuses," who can diagnose and resolve a wide range of hardware and software-related problems. To ensure personalized attention and a convenient visit, Apple provides the option to schedule a Genius Bar Reservation.


Contact Genius Bar.

Manage Reservations - My Reservations - Apple



Originally posted at discussions.apple.com/thread/256363160