Fibreglass cows have been converted into 4G Wi-Fi hotspots, which will be installed on the Somerset farm by the technology partner of Glastonbury Festival 2014.
The cows are modelled on Worthy Farm's famous dairy herd at key points across the 1,200-acre site.
Spencer McHugh, director of brand at EE, said: "Staying connected has become an essential part of any festival-goer's experience and we are thrilled to be back supporting Glastonbury Festival."
The high-speed cows have been decorated by artist Hank Kruger and his team, who have been decorating the festival grounds since the 1980s.
"It's not the first cow I've ever painted but it's certainly the most high-tech," said Kruger.
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