iPhone using Sony cd (Generation 2)

[Russ]

Hoping I’ve put this in the correct section, apologies if not.

Is it just me or has anyone else using an iPhone (using iOS 11) connected to a Sony Generation 2 radio unit noticed the volume has decreased? Also i know you can just increase the volume when on a call but is there any way to increase the call volume and ‘fix’ it at the new volume?

Ive added a picture of the Sony unit for clarity

[Russ]

Just a follow up to this....I’ve just figured that when on a call using bluetooth in the car (where I am just now), you use the volume buttons on the phone to increase the bluetooth volume! Problem solved!