I, too, understand this to be correct but cannot verify. Any cellular ph is capable of a 911 call even if it is not under any company service agreement (or the $ ran out on a prepaid phone) and/or has no SIM.
“I have read that it may even be usable as an “emergency” phone—apparently cell providers have to let you dial 9-1-1 over any network in range, even if you are not subscribed or have a sim card. **can anyone verify if this “emergency” use is true?**”