
Well, this could be one for the bug team to sort out.
A number of oPhone SE early adopters have reported audio issues with Bluetooth phone calls when the smartphone is paired with a vehicle or wireless headset. The issue extends to GPS voice navigation for some, but streaming music over Bluetooth appears to be unaffected.
The users claimed to be experiencing distorted, staticky, or inaudible phone calls when using an iPhone SE over Bluetooth. Many of those affected noted that their previous iPhone model had “crystal clear” audio quality.

