Originally Posted by
IAD_flyer
I was under the impression that the in flight wifi service is blocking VoIP calls. Did OP find a workaround or is that not the case? Maybe only the domestic gogo service does that.
I believe GoGo is blocking the default port assignments typically used by VoIP and streaming services. Some of them allow you to redefine those settings making it impossible to block all of them, especially those that use IP addresses. And those using VPN services may be able to slip past the filters as well.