The ruling on answering a mobile phone during prayer

Question:
May Allah reward you. Honorable Shaykh, he says: A man is praying, and his mobile phone rang, so he answered it while in his prayer by saying "Subhan Allah" (Glory be to Allah) to let the caller know he is praying. What is the ruling on this?

Answer:
The ruling on this is that it does not invalidate the prayer. If we were to permit something like what the Prophet (peace and blessings be upon him) did when someone asked for permission to enter while he was praying, we would permit it. This is "Subhan Allah," which does not invalidate the prayer because it is a prescribed remembrance of the same type as what is recited in prayer, so it does not invalidate the prayer. However, I advise those who pray that they do not carry mobile phones, or if they do carry them, they should turn them off when they enter the prayer, or turn them off when they finish the prayer, so that they do not distract them and they can pray. Or they should not bring them with them to the mosque; they should leave them in their homes or in their cars.