Bring sound back to hearing aids from iPhone 14

Re: "Bring sound back to hearing aids from iPhone 14" : Widex hearing aids.

Just got them connected but hear no sounds when I change the equalizer buttons. Help?"

You can check whether or not phone and media audio are routed to the hearing device.

Eg: Use Made for iPhone hearing devices - Apple Support

says:

"your Apple device can control microphone level (volume), audio presets and more for your hearing device."

"Go to Settings > Accessibility > Hearing Devices.

To see more settings, tap the name of your connected hearing device".

also:

"For quicker access to some settings and features: Use the Hearing module in Control Center.

To add the Hearing module, learn how to customize Control Center on iPhone or iPad"

You can also: Route and automatically answer calls on iPhone - Apple Support if you wish.

More info. on Hearing accessibility features in iOS - Apple Support

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Re: Widex

There are twenty-five different Widex models that are compatible with IPhone:

You may want to check if your hearing aids are listed as compatible:

List of Made for iPhone hearing devices - Apple Support

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Re: Firmware and App updates : eg: may be available from time-to-time:

Check with your hearing-specialist or the hearing-aid manufacturer (Eg: contact "support" on their website)

for a possible hearing-aid firmware update, or, if you use an app, an app (or firmware) update may be available.

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If needed:
Apple's Accessibility Support Website (info. / support / contact options etc.) .
(NB: You can Get Support from the link at bottom of their website:)
Accessibility Support - Official Apple Support

All the best :-)