iPhone
On your phone, go to Settings> General> About. If you have an iPhone 7 or earlier, you can find the model on the back of your phone.
Android
On your phone, go to the Settings or Options menu, scroll to the bottom of the list, and select 'About phone', 'About device' or similar. The model should be listed here.
You can find the model of your hearing aid in these places:
If you can’t see the model in any of these places, please contact your hearing care professional.