A thief dipped into a customer's bag at a McDonald's in Chesterfield and stole her mobile phone.
The crime happened at the Low Pavement restaurant on an afternoon when the branch was busy.
While the victim was ordering her food, she put her black Samsung Galaxy Edge 7 in her handbag, which was on her shoulder.
The thief snatched the device before fleeing.
Police have now issued a CCTV still of a male they would like to speak to in connection with the incident, which happened on September 28.
If you recognise him, call PC Rich Clarke on 101, quoting reference 16000298437, or contact Crimestoppers on 0800 555 111.