Thames Valley Police is appealing for witnesses after a robbery in Bletchley on Sunday.
At about 7.45pm, an 18-year-old man was walking home along Westminster Drive, with a friend who was on a bike some yards ahead of him. The victim was talking on his mobile phone, when two men assaulted him from behind, punching him several times to the head and body. As he fell to the floor, the offenders stamped on his head about five times, before running off with his iPhone.
The victim was taken to Milton Keynes Hospital to be checked over and was discharged with no serious injuries, although he was left very shaken.
The black iPhone had a Gears of War 3 sticker on it and a half moon shaped crack on the bottom left corner of the screen, with dents in the top and a chip in the top left corner.
The first man was black, with very dark skin, about 6ft 2ins, of average build, aged about 18 years old, with short black curly hair. He was wearing a black zip up jacket, black tracksuit bottoms, black trainers.
The second man is mixed race, about 5ft 4ins, of average build, about 19 years old and was wearing a brown jacket with the hood pulled up over his head, black tracksuit bottoms and black trainers.
Anyone with information can call police on 0845 8 505 505 or Crimestoppers, anonymously, on 0800 555 111.