Problems with voice during CarPlay calls since iOS 11.3

I have this problem too. My iPhone 7 with iOS 11.3 does not work any longer with CarPlay. When I call the voice is fully distorted. My wife's iPhone SE with 11.2.x does not have any problems, it's fully functional. I am really shocked that such a mess could happen with all the testing.

I’ve got same issue on VW Golf 67 plate

Was working fine until upgrade of iOS

I’ve changed cables and rebooted everything with no joy

Bluetooth works perfect so definitely an issue with CarPlay in iOS 11.3

Please Apple fix this asap

It looks much better since iOS 11.3.1 now. I have a BMW 4 series with wireless CarPlay and it was really slow and not useable since 11.3. Since yesterday it is fluid like before 11.3. Can anybody confirm?

I have just got my Seat Ateca back from Seat, they replaced the USB ports and still having the same issue on both mine and my wifes iPhone 7 apple says its the car but Seat says it apple! So annoying!

Have a SEAT LEON FR 2017 and an iPhone6s and have the same problem since 11.3.

Updated to 11.3.1 and still the same issue.

My wife's iPhone still on 11.2.x has no issue on the same car with the same cable.

Please correct this issue asap as it make CarPlay unusable (need to connect via Bluetooth only) and creates a potentially dangerous situation as now needing to touch the phone while driving.

I have the same issue and I’m on IOS 11.3.1with an Anker lightning cable and Kenwood head unit.

Maps & Spotify are great via Carplay. Voice calls are great via bluetooth but as soon as I try a voice call via carplay it is distorted and unintelligible.

I have tried all the usual i.e. turn on Siri, turn phone off/on, tried different lightning cables, update IOS etc.

problem persists - come on Apple what are you doing? This is a fundamental feature of carplay!

I have swapped phones with my daughter who never upgraded the IOS. Works great 11.2 useless for calling on 11.3. Remember there tech support is level 1 and they go a step resolution so the ticket gets resolved and out of there que. This needs level 3+ support if not Apple engineering. If Kenwood cannot get any help the rest of us sure wont. Quick question, has anyone tried calls from 3G turning LTE off? just curious thought about that today. Have not had time to test at home.

Here the same issue and i almost trie everything.

From different cable to different car nothing solves the problem. Different phone with iOS 11.2 was the only solution that worked but the rollback period for iOs is closed so that can’t solve my problem anymore. For tomorrow i have a supportcall planned with apple so I curious what they are going to say.

11.3 did this in the update:

Telephony

Available for: iPhone 5s and later, and WiFi + Cellular models of iPad Air and later

Impact: A remote attacker may be able to execute arbitrary code

Description: Multiple buffer overflows were addressed with improved input validation.

CVE-2018-4148: Nico Golde of Comsecuris UG

Curious what this is? Sounds like a buffer overflow issue when the person hears you on the other end.

Same issue here....iPhone 8 and Kenwood DMX7017DABS.

Works fine via bluetooth but not via CarPlay. Oddly it's not to every number. Just certain landline and mobiles. Very strange.

Took car into garage to check all leads etc and they say they are having similar issues with other users.

Onto Apple Support via Twitter and I've sent them the link to this thread.

I also tested it with two different headunit and i still had the same issue. This was also something that Apple asked.

The units i tested with:

Seat leon (2016)

Seat leon (2017) headunit is a newer model.

Opel Karl (2017)

Same problem here. 2018 Skoda Karoq. People saying I sound like I’m underwater when using the built-in phone app and cabled CarPlay. WhatsApp dialling fine apparently. Bluetooth also fine. Tried iPhone 6 and iPhone 7. Both iOS 11.3.1. Tried different cables. Glad it’s probably not a hardware problem with either my phone or my car and that Apple are on the case...

unfortunately, Apple does not confirm everything that we suppose and does not take the responsibility that it is a bug of the update 11.3.1

the Apple operator told me that there are too few complaints to try and find a resolution to the problem with the next update.

😳😳😳

the garbling issue must be a mixed bag then because its certainly sorted out my issue iPhone 7 128gb using full link /carplay seat Leon 65 plate , clear as a bell through usb , as before was garbled rubbish , Bluetooth remains as clear as before, must be other factors contributing to issue ???

Although, I will mention that I am an avid user of the stock Earphones that come with the iPhone. I will have issues on a daily basis making calls with them. Similar to the car play issue, I will have to re-seat (disconnect and reconnect) the earphones from the phone in order for the other party to hear me. I can hear them fine, but they will not be able to hear me at all. I'm not sure if this is related at all to the CarPlay issues we're all having but it is worth mentioning in case its related to a much larger issue such as the known Audio IC problems that the 6 and 7 are prone to.