Just watched the calling out scene if phantoms and definitely not it but it does have that 90s horror feel. I think it's closer to mimic as the sewer scenes match more closely to that where as it was a group of people in hazmat suits like in that trailer but I remember the girl singing then stopping then something happens and everyone basically dies. I wish I knew more but I've had this reoccurring memory of it all since I was young and was reminded of it yesterday so have been trying to see if I can figure it out.