The 16 year old from Kilburn, who can’t be named for legal reasons, has been convicted of robbing the teenager at Pinehurst Roundabout in Meudon Avenue, Farnborough, on January 6 this year.
He was also convicted of possessing a knife in a public place and possessing cannabis.
Basingstoke Magistrates Court heard the victim had been walking to the town centre when he was approached by two males. One showed him a knife and made him hand over his new iPhone and AirPods.
When arrested a couple of days later, the 16-year-old had the victim’s AirPods on him.
The 16-year-old is due to be sentenced on December 18.