Is it good for the Imam to command the worshippers to straighten the rows and turn off their phones before the prayer? And is the Imam considered correct in abandoning the supplication "O Allah, Lord of this perfect call..." after the Adhan and the Iqamah, and is there a difference of opinion among scholars on this matter? And what are the proofs of those who say it should not be recited after the Iqamah, and are they strong and sound?

Reminding worshippers to turn off their phones and instructing them to straighten the rows are among the duties of the Imam, as these fall under enjoining good. As for supplicating after the Adhan, it is recommended, and likewise after the Iqamah according to many jurists. The Imam reminding people of it is permissible, but he should not be criticized if he omits it, as it is a recommended act and not obligatory, and he does not sin by leaving it.