Muslims believe that Quran is God revelation to prophet Muhammad (peace be upon him) through the Angel Gabriel (Jibril). Quran being the words of God (Allah) is fully respected by Muslims.
Muslims use Quran as:
Belief and faith
The Quran is the holy book of the Muslims. He enjoys reading the Quran.
Muslims use the God holy book Quran. They follow also Sunnah (that is prophet Muhammad PBUH saying and practices)
No the Muslims live by the quran.
All Muslims of all countries of the world use Quran (Koran).
It is required by the Quran.
It is not clear what is meant by a prayer book. Muslims have their holy book Quran. During the prayers (Salat), which is the second pillar of Islam five pillars, Muslims recite some verses of Quran. Also when praying for God and asking his forgiveness and mercy and asking for His blessings they may use in these praying some verses from Quran.
the Muslims call their bible "the book" QURAN
Muslims can read the Quran anytime, with a few exceptions.
For Muslims to recite Quran, occasionally, before or after praying.
The Muslims get their beliefs from the Qur'an and the Sunna.
Muslims follow the prophet Muhhamad, from the Quran.