Was the speakerphone on? Who would use a speakerphone for a conversation with POTUS? Even if the loudspeaker on a mobile phone was on, you wouldn't be able to hear clearly who was on the call or what was being said more than a couple feet away. Most people hate mobile phone speakers because of their lousy voice quality. How did he know it was Trump and Sondland? Who was on the call at the outdoor restaurant?
This whole premise is just preposterous and beggars disbelief. This just doesn't pass the most rudimentary smell test.
This whole shampeachment is one stupid episode and testimony after another.
Im guessing this guy is a spook and heard the conversation the old fashioned way - through a tap. A lot of these diplomats are probably CIA. Take a look at Steve Pieczenik on YouTube. He has an interesting perspective.
Sondland testified that it was indeed Trump.
I think Sondland likes to impress people with the fact that he can get to POTUS.
No one's disputing that the call took place or the basics of what was discussed.
The only potential disagreement is Sondland remembered discussing "Burisma" and Holmes said he heard "Biden".