well said, how do people even come up with things like this, seriously i can;t understand.
try any of the phone on loudspeaker and come close to each other and it will be the same. same as you come with a mic to the speaker and it starts emitting squeeky sound. huh, just don't understand why people always bashing android for everything instead of trying with different equipment first.
and second try to lower down the volume when on loudspeaker maybe it will reduce the cracking sound or it's again the issue calling to another phone on loudspeaker which is too close?