It’s been a few years since this happened, but I get a good chuckle every time I think back on it.
I used to work customer service for one of the top wireless service providers in the U.S. and would also serve as first level tech support when needed. I had a gentleman call in and was telling me he was unable to retrieve his mail on his phone. We go through all the basic stuff, and he let out a huge exasperated sigh and said “I just don’t understand why it keeps asking me for my Email! I don’t have Email, I have G-mail!” After pressing mute and giggling, I explained that Gmail was his email and the call wrapped up quickly from there.