Re: New bluetooth Hearing Aids hearing static only on phone calls with my iphone 16 pro max
While on a call you can manually direct the audio to the hearing aids.
While on a call on iPhone - Apple Support
Eg says:
"Adjust the audio during a call
To change the volume, press the volume buttons on the side of iPhone.
Or swipe down on the call banner, then do any of the following:
- Mute: Tap the Mute button.
- Put the call on hold: Touch and hold the Mute button.
- Talk handsfree: Tap the Audio button, then choose an audio destination." (Hearing Aids)
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Another option is to automatically direct calls to the hearing aids:
You may want to: Route and automatically answer calls on iPhone - Apple Support
You can automatically direct the audio of phone or FaceTime calls to your hearing device.
iPhone can also automatically answer calls after a length of time you set.
Eg : says:
- Go to Settings
> Accessibility > Touch > Call Audio Routing, then choose an audio destination. - Tap Auto-Answer Calls, turn on Auto-Answer Calls, then set the duration of time before the call is answered by tapping
or
.
During a call, you can switch the audio routing from your hearing aid to the iPhone speaker by removing the hearing aid from your ear.
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Wondering whether the Hearing Aids are listed as "Made for iPhone" (Mfi) compatible.
List of Made for iPhone hearing devices - Apple Support
Eg says:

if your Hearing Aids model is not listed, you may need to rely on an app from the manufacturer for control.
Else: If you haven't seen it yet: Apple Support provides tips for Mfi Hearing Aids in the article below.
Use Made for iPhone hearing devices - Apple Support
There's an "If you need help" section at the bottom of the above article..