https://www.assimalhakeem.net/i-wanted-to-know-whether-or-not-its-haram-to-have-the-adhan-as-the-ringtone/
https://www.assimalhakeem.net/sheikh-is-it-permissible-to-use-a-nice-recitation-of-the-quran-as-a-ringtone/
Keeping Ayahs, Verses of the Quran and Athan as Ringtones
And Allah Knows Best