Re: Waking for Fajar
I’m also interested to know this. Are you sure you’re not confusing this with tahajjud? It sounds kind of shady particularly if it’s about Fajr. A person should be vigilant about their salat times themselves and not be waiting for angels to wake them up. Sure they might take active roles in certain cases, but for the most part, we have to make our own effort and not wait for angels to take us for salat or other ibadaat.
As for the topic, from time to time, I’ll happen to wake up at Fajr time, possibly out of concern and the fact that I tend to wake up at night anyway several times and then I’ll check the time. However, as for something unseen waking me up for Fajr, I don’t have any reason to believe that that is what’s going on.