This function may not work if the contact is saved on a SIM card.*
Open "Gallery" app or : - open a picture, - tap on "More" or , - tap on "Set picture as" or "Set as", - tap on "Contact photo" , - choose a contact, - crop the photo and/or tap " Confirm" or tap on "Save". or Open "Contacts" app : - select a contact, - tap on, - tap on " Change" or tap on , - tap on "Take photo" or "Choose photo" or "Select new photo", - crop the photo and/or tap on " Confirm" or tap on "Save".