Prophet Muhammad (peace and blessings be upon him) said: “In Paradise, there is a gate called ar-Rayyan, through which those who used to fast will enter on the Day of Resurrection, and no one but they will enter it.”

Yes, the devils may whisper to man in Ramadan, and the practitioners of witchcraft may practise their craft during Ramadan because there are other causes of evil action besides the devils, such as evil souls, bad habits and the human devils.