Iblis was not an angel for a single day, not even for an instant. He is one of the jinn. The angels were created noble; they never disobey Allah when He commands them to do something.

Angels in Islam are a part of the world of the “Unseen” which we cannot comprehend. Allah has told us about them in many places in the Quran and via His Prophet Muhammad. Belief in angels is one of the six pillars of faith without which there is no faith.