[grav]

TL;DR: created a wifi-network on another phone with same SSID and password as the one that the lost phone usually connects to, walked around waiting for the phone to connect, receive the "Find my phone" notification and send out a sound.

Cool :)

[mgarciaisaia]

This, but without the "Find my". Not sure if my cousin would have been able to log into his account from another phone (maybe MFA would be a blocker if he tried), and my hotspot didn't actually provide Internet anyways.

I thought about "relaying" the place's Wi-Fi connection through a chain of phones sharing via bluetooth and Wi-Fi, but luckily we could find the phone without having to try that. The setup would have been something like:

Router <-Wifi-> Phone <-Blutooth-> Phone <-WiFi-> Phone <-....