Wifi Calling...Does it turn off or put to sleep the cellular radio?

[tresmith]

I'm just curious to know how exactly the handoff process works between wifi and cellular during a call.

When you are on wifi is the cellular radio "turned off" or put in a sleep mode, so to speak?

 

[aldrinjtauro]

The cellular radio is never turned off unless you're in Airplane Mode. Instead, if you're on Wi-Fi, the cell radio turns off the data connection and drops its IP address. But it's still technically on an LTE or HSPA or 3G connection.