It was taken at around 12.15pm on Sunday 4 August 2013, when a woman was in New Look, Victoria Centre. She put the Sony Experia down while looking at goods before leaving the store. When she realised, a short time later, that she had forgotten the phone the woman returned to the shop. However, the phone had been taken.
It is believed that the man caught on camera picked up the phone and left the shop.
Pc Kelvin Troughton, of Harrogate Safer Neighbourhood Team, said:
If you recognise the man caught on CCTV I ask that you contact the police straight away.
I am also keen to speak to the man himself, as it is possible there has been some confusion and he is not responsible for this theft. I urge him to get in touch immediately.
Anyone who can help with this investigation is asked to contact Harrogate police on 101, select option 2 and ask for Kelvin Troughton. Information can also be emailed to firstname.lastname@example.org
Or call Crimestoppers anonymously on 0800 555111, quoting reference number 12130133033.