This is a new one
People are being woken up in the middle of the night by a single ring on their phone.
The scammers are hoping that people call the number back out of curiosity or alarm.
The phone number is an African version of a 900 pay per minute number.
https://www.broadcastingcable.com/news/fcc-warns-about-one-ring-calls-that-ring-false
@0x56 I have do not disturb set up with a white list of numbers allowed to ring through. All texts are muted, because if it's an emergency you call. Surprising number of spam texts come at night for me.