Detectives have appealed for information following a robbery in Chafford Hundred.
The 18-year-old victim was on an alleyway behind Tesco at Merlin Close when he was pushed over and robbed of a mobile phone.
The incident happened at about 12. 30pm on Saturday September 1.
Two suspects were involved and they took a black iPhone 4 the victim, who lives locally, had been holding in his hand.
They ran off towards Drake Road. The victim was shaken but unharmed.
The main suspect was said to be white, aged 19-20, of large build, about 6ft 2in tall and was wearing a grey tracksuit with black trainers. The victim did not see the second suspect to give any kind of description.
Any witnesses, or anyone with information, should contact the CID Target Offender Team at Grays police station on 101 or call Crimestoppers anonymously on 0800 555111