One hearing yes to iPad no to phone

Wondering if you have tried turning Bluetooth off, and back on, on the iPhone.

or

Sometimes restarting the iPhone may restore order if something is not working as expected (deletes temporary files, re-estalbishes connections, may update recent setting changes, etc

Apple support's list of Made-for-iPhone (Mfi) hearing-devices lists the Starkey models below .... List of Made for iPhone hearing devices - Apple Support

Starkey

• Evolv AI*
• Genesis AI*
• Halo
• Halo 2
• Halo iQ
• Livio AI*
• Livio*
• Livio Edge AI*

There is pairing / connection info. for the compatible models in this article below:

Use Made for iPhone hearing devices - Apple Support

Eg: says:

"Hearing device doesn't appear in Hearing Devices settings

• Make sure your hearing device is compatible with your Apple device.
• Make sure your hearing device is in pairing mode.
• Restart your Apple device. 
• If your hearing device is paired with a different Apple device, unpair it

Then try again on your other Apple device.

• Make sure your hearing device is updated with the latest firmware from the manufacturer. If it has its own app, that app can probably find and install firmware updates."

Re: One hearing yes to iPad no to phone

You may want to check in the app (or with the hearing-aid manual, the manufacturer's support website, or your hearing professional) to see if a firmware update, or an app update is available, so your hearing-aids remain compatible with your device(s).

Thank you for replying, and for letting us know. All the best :-)