"I just hope to God you saved my number / Call me when you can"
The rap-oriented festival returns after a year's absence this November
It comes less than a week after a new billboard and hotline prompted speculation new music could be on the way
Fans have pointed out a phone number being advertised in Los Angeles leads to a voice recording between Tyler and his mother
Next year's festival will take place over two weekends in June
See the full line-up for 2021 here
The festival – which will be celebrating its 20th anniversary in Manchester, Tennessee - will take place from September 2 to 5
A snippet of the song appeared in a Coca-Cola advert last month
One fan compared it to "a hybrid" of 'Cherry Bomb' and 'Flower Boy'
It is the Odd Future rapper's first track of 2021