Anybody know of a way to turn on wifi calling when cellular radio is turned off?
Say for example I travel internationally and buy a local SIM card for my iPhone 7. That works great: I have a local phone number and local rates for communicating in the foreign country.
Now, I'm returning home to USA and I want to use my VZW phone number again over WiFi in the airport. I want to keep the phone in airplane mode, so that I don't pick up roaming and possibly the $10/day charge.
However, when I swap my VZW SIM back into my phone, wifi calling is not enabled (it was enabled when I popped the SIM out of the phone, but it appears not to be persistent). The only way I can find to enable wifi calling is through the settings app, Phone->Wi-Fi Calling. But this is disabled when in airplane mode.