Why does my phone first shows “Hands-free” and then the name of the hearing aid when connecting to my mobile phone?

This is a normal process for Bluetooth connectivity when pairing the Phonak hearing aids the first time.

You may see cryptic numbers first in the form xx:xx:xx:xx:xx:xx (see picture 1). This is the Bluetooth address.

Also, you may see 3 devices instead of one as Bluetooth Classic and Bluetooth LE are shown as different devices

You see there are 2 different Symbols
The one with the handset is the classic Bluetooth you need to connect for phone calls

After some seconds, you see the name of the Phonak hearing aid.