> In the other case, I leave the facility, get to safety, but my phone is either destroyed, or in a pile with 900 other concert-goers' phones, and I need to either wait around (in a place where emergency services probably don't want extra people), or _replace my destroyed phone_.

You should check out how Yondr works: https://www.overyondr.com/howitworks/

The phone stays with you.