The three-day festival was headlined by Stormzy, The Killers and The Cure.
The mobile operator, which is the official technology partner of the festival and installed 5G coverage for the event for the first time, said more than 103.6 terabytes of data was used – the equivalent of more than 51.5 billion Instagram pictures being uploaded.
EE said data usage was also 1,000 times the amount used at the event in 2010.
Using data gathered from the firm’s own official Glastonbury app, EE said Saturday night headliners The Killers were the most anticipated performance of the festival, with more than 55,000 users adding the Las Vegas band to their personalised line-up section of the app.
According to EE, Sheryl Crow’s performance on Friday afternoon was the most streamed using the BBC coverage available inside the app.
The telecoms firm’s marketing communications director Pete Jeavons said: “Every year at Glastonbury Festival we see the demand for data increasing and this year all expectations were surpassed.
“This legendary festival is one of the most exciting places on the planet for music fans and our data shows that people are as keen as ever to share their experience with friends and family.”
The festival also included a surprise appearance from Sir David Attenborough – the moment the mobile operator said was the busiest time on its network during the entire festival.