But isn't everyone being on WhatsApp or FB Messenger or whatever just elevating the device uncertainty to platform uncertainty? You still have to remember or check who is on what.
It seems like if they generally are all on iPhone, FaceTime is the one thing you could reliably call them on, and it will even tell you right in the messages app if you can FaceTime them.
It seems like if they generally are all on iPhone, FaceTime is the one thing you could reliably call them on, and it will even tell you right in the messages app if you can FaceTime them.