Switch Bluetooth from hearing aids to car

Hi Brecon-Beacons

welcome to the Apple (user-to-user) Community!

Re: "Switch Bluetooth from hearing aids to car"

Am no expert in this area, yet we may uncover some clues to a solution, and those with experience may join in.

Wondering what may be possible in your situation:

Eg: Some hearing-aids are "Made for iPhone" compatible, while some are not:

If needed: List of Made for iPhone hearing devices - Apple Support

and

Your car may or may not be a model that uses "CarPlay": iOS - CarPlay - Available Models - Apple

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Re: "Is there a way to switch Bluetooth automatically from hearing aids to car

without touching the iphone when driving/receiving/making a call?"

You may need to check just what is possible in your particular case, with the hearing aid manufacturer and / or with your car.manufacturer's app, manual, or website.

Eg: See: (Non-Apple online article) Switching from Phonak hearing aids to the car

https://product-support.phonak.com/s/article/Switching-from-Phonak-hearing-aids-to-the-car-speaker?language=en_US

If your car uses Car Play, there may be help via speech ... available with some tasks, using Siri.

You can use Siri with CarPlay to access many of the apps on iPhone ...

eg: Wondering if your hearing aid manufacturer has an app installed / available for your iPhone

How to: Use other apps with CarPlay - Apple Support

Accessibility support options if needed:

Eg: There's a "Get Support" link (online chat / phone / email etc.) at the bottom of the webpage (link below).

How to: Get accessibility support for all Apple devices (info / support / contact options etc.).

or

Need more help with accessibility features? Contact Apple Support.

All the best :-)