My impression was that hallucinations only happened under extreme conditions, like drugs, alcohol, heat etc, but it’s a bit worrying that it could happen basically anytime.

If the brain “learns” that it can accomplish things via this method, then that could be really problematic.

Possibly... I have had minor auditory hallucinations while I'm falling asleep. Most often it is a single sound, like a high pitched ding or bong. It sounds like a notification, but very unlike one from my phone. It is definitely purely internal.

That’s interesting, I hadn’t considered the falling asleep state. Yeah maybe that has happened to me too.

It’s hard / practically impossible to determine exactly what it is though. It might be someone in the next room, someone walking past, another sound entirely that got morphed into the sound you heard to fit your brains narrative as you were falling asleep. Might even be that your phone was hacked!

Something sort of similar: I used to feel phantom phone vibrations when I had the vibration feature activated.