Android car stereo Bluetooth issue

[darren jay]

Hey guys, I’ve just recently purchased an android car stereo with android 8.1 on it. I’m having an issue where my iPhone Bluetooth sound is really crap streaming to the unit but with an android phone it sounds fine.
My research has come to the fact that the iPhone uses aac encoding.
I can go into the units developer functions and change to AAC but once I exit out the setting is never retained , reverts back to ‘default’ which obviously isn’t AAC.
I’ve searched high and low for an answer but I can’t for the life of me work it out!
Is there something I’m doing wrong ?
Regards
Darren

 

[Dannydet]

Change your iPhone output settings from acc....

• Swipe up from the bottom of your Home screen to launch Control Center.
• Press firmly (iPhone) or long press (iPad) in the audio playback section of Control Center. ...
• Tap the AirPlay button on the top right of the new window. ...
• Tap the device to which you'd like to AirPlay audio.

 

[darren jay]

I’m confused , how does that change the output format ? There is no option for that ?