it's all BLE and works great on an airplane as long as BT is on
CGMs use bluetooth
Bluetooth has a terrible reputation around reliability. :(
In the loop community (CGM+insuling pump) you usually have a list of phones that work well with Bluetooth. Yes that changes when the phones get new powersaving settings and driver updates, usually it works well on good phones.
Yeah, that sounds like a practical approach for dealing with it. :)