Receiving calls using MFI hearing aids in a car

My car is old, so no CarPlay, but I use to mount my iPhone to use a GPS app, and my MFI hearing aids are paired with my iPhone so it works as a hands free and I have no problems hearing the caller speaking - but as the iPhone is mounted on the dashboard, it isn’t close to me and I don’t speak very loud, so I wonder if there’s a solution so the caller can hear me? Would an external wireless mike work? Would it interfere with my hearing aids somehow?

Anyone knows?

iPhone 13, iOS 26

Posted on Oct 8, 2025 10:36 AM

Reply
5 replies

Oct 12, 2025 11:49 PM in response to Wilfred Hildonen

Re: Receiving calls using MFI hearing aids in a car


Am no expert in this area, yet your question deserves some response, if only to provide more opportunity for others to share their knowledge or experience.

________

First step: Discovered Apple sells a wireless microphone for use with iPhone, and seems it uses an app for control: so at least there's that possibility.

https://www.apple.com/shop/product/HS4C2ZM/A/røde-wireless-micro

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Next step: Sorry I don't know whether or not an external mic works with iPhone in a car while using hearing-aids though. Lets see if anyone else joins in the discussion.

or

Although the high quality of that microphone may not be necessary for your needs:

The manufacturer of above microphone may have more info. on what's possible,

https://rode.com/microphones/mobile Their support center: https://help.rode.com/hc/


Oct 13, 2025 9:29 AM in response to Wilfred Hildonen

I am not an expert on these issues, but it appears that in the days BEFORE MFi hearing aids were available, a device like the Resound Phone-Clip+ was used to "impersonate" a wireless headset, connect via bluetooth to your phone, and provide both a microphone and a hearing connection. Phone Clip+ simply used its own microphone, and used your hearing aids as the 'headphone' component. That device does not appear to be for sale as new, but I except the functions were incorporated into MFi Hearing Aid Apps, and never removed.


For a currently available device today, you may have to adapt a microphone designed for a lecturer to wear in an auditorium for this purpose.


Your hearing aid professional should have the knowledge to guide you. The prices of new devices through hearing aid professionals reflect that their payment model incudes compensating them for their consultations in the Retail prices of the devices and accessories sold.

Oct 13, 2025 11:03 AM in response to Wilfred Hildonen

The other thought that occurs to me is using an Apple watch microphone as the microphone.


Recent versions of Apple Watch GPS-only are fully capable of making and receiving cellular calls when the iPhone is nearby, provided your cellular carrier allow it (as most do).


I do not see clarity in Apple documentation about using Apple Watch microphone input with hearing aids sound output.

Oct 13, 2025 12:11 PM in response to Wilfred Hildonen

Wilfred Hildonen wrote:

Well, that’s interesting, but I don’t have an Apple Watch and won’t be able to afford one, at least not for now. I’ve read that one may connect multiple devices to Bluetooth simultaneously, but the question is if two can use sound input and output simultaneously.


That's an interesting question.


I think Bluetooth is fully capable of doing this job, with multiple inputs and outputs going by each other at what appears to be simultaneously.


What concerns me is the ability in iOS with the hearing Aid apps to redirect all the inputs and outputs to achieve what you desire.


But sometimes it all surprises me.


I connected a TV streamer, and a whole new (never before seen) group of options appeared in the Hearing Aid software to deal with it.


I added an Apple watch, and it also appeared as a device in the hearing aid software.

Receiving calls using MFI hearing aids in a car

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