People could connect to an in flight WiFi and theoretically make voice or video calls that way, but even that remains prohibited for reasons involving more than just safety. The FCC scuttled a plan in 2017 to consider letting passengers make calls once the plane gained at least 10,000ft of altitude after it faced strong opposition. The pilots, flight attendants, and various members of the general public were against it, partially because many don't want to endure an hours long flight filled with competing phone calls