Can I have sehri till the azan for Fajr salah is over?
The azan of Fajr is called when the time of sehri is over. If the azan of Fajr was started or the time of azan approached and the time of sehri was over then now it is not lawful to eat sehri. In sehri one should stop eating before five minutes as precaution.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband