the main thing is you all are gonna have to have another device to do it, there are a few phones with the capability but they tend to be expensive, mainly military use.

i hate to break it to all the mobile device lovers that almost nobody has devices that are going to enable it. most public wifi networks have wifi isolation which means they refuse to route traffic between nodes on the network. specialised small devices that create meshes could be used but they essentially would be your uplink to an internet connection and have mesh networking between them, and then clients would connect to the mesh nodes like regular wifi.

i'm happy about this, personally, i hate mobile devices, because the way that military and industry have set things up, they want to use it as a funnel for your attention. so, yes, it would require secondary devices to enable it with regular domestic wifi capable devices.