Some Mu'adhins (callers to Prayer) announce the Fajr (Dawn) Prayer, then make the Du`a' Ma'thur (supplication based on transmitted reports), then say into the microphone: "Come to Prayer, may Allah guide you.''
Some people criticize them while others support them. What is the ruling in this regard?
Allah (Exalted be He) says:
This day, I have perfected your religion for you, completed My Favour upon you, and have chosen for you Islâm as your religion.
The Prophet (peace be upon him) said:
You must follow my Sunnah and that of the Rightly-Guided Caliphs. Stick to them and hold fast to them. Beware of newly-introduced matters in (religion), for every newly-introduced matter is a Bid‘ah (innovation in religion), and every Bid`ah is a Dalalah (deviation from what is right).
He (peace be upon him) said also:
Anyone who introduces anything into this matter of ours (Islam) that is not part of it will have it rejected.
It was reported that some of the Salaf (righteous predecessors) said: "Follow (the Sunnah) and do not innovate. For you have been given what is sufficient." (Part No. 6; Page No. 101) Therefore, with regard to acts of worship a Muslim should abide by all that was authentically reported. One should not add anything in this regard under the pretext of it being good. Had it been good, the Prophet (peace be upon him) would have done it or ordered us to do it and it would have also been done by the Sahabah (Companions of the Prophet). Thus, the answer to your question is clear. You should abide by all that was authentically reported with regard to the wording and manner of announcing the Adhan. Any words added to what was authentically reported will be considered Bid`ah (innovation in religion).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.