Does the cell network have a single point of failure which could explain these concurrent outages across carriers? I have a (somewhat crude) mental model of how

Does the cell network have a single point of failure which could explain these concurrent outages across carriers? I have a (somewhat crude) mental model of how the internet works, so if this were a nationwide internet outage I would at least have an inkling of whether it was an accidental misconfiguration, bad actor launching an attack, etc. I have no such model for the cell network!