[zmmmmm]

And then you get the law suit because someone in a Wifi zone but without cell coverage couldn't call 911.

[nyuszika7h]

It's simple. Force it to go through the regular cellular network first, and if it doesn't exist (e.g. because you're on a WiFi-only tablet) or is unreachable then try to fall back to another app.

[ipython]

Most carriers have their own voip gateway already built into the carrier settings to handle this situation. No voip app needed.