BT if in range, WiFi if not but on a known network. Done that way for power savings. I love my iPhone, but the ecosystem integration is also a huge point for m

BT if in range, WiFi if not but on a known network. Done that way for power savings. I love my iPhone, but the ecosystem integration is also a huge point for me. The little ways different Apple products work together adds so much niceness and extra value above the utility of the individual products.