I'll throw my two cents in - In the past year I've been able to make WiFi calls using the Value plan while out in the middle of the ocean on both the Valor and Sunrise but noticed that the time of day definitely mattered. The calls were crystal-clear very early in the morning when few others on the ship were on the WiFi. As the day progressed and more people were up and on the WiFi, the calls would become increasingly more difficult to connect, and once connected were prone to dropping or sounding choppy / garbled. That said, I never expect to be able to make ANY type of call on a value plan w