i9300 Calls received from iPhones sound bad
My i9100 broke, so I tried using my i9300 instead. Unfortunately I found a really weird problem.
Most calls I receive sound right, but for some reasons when I receive calls from an iPhone, their voices sound really bad and it's very hard to understand what their saying, but in the other side, they can hear me just fine.
Putting the call on speaker or changing the volume doesn't help.
The voice sound really metallic, I don't know how else to describe it.
Switching lineage OS works fine. I've tried switching to the first version of Replicant 6 but the problem continued the same.
The only reason I think it happens with just iPhones, it's because my dad and my brother have them, while I receive calls from my wife and other people just fine.