Geoff the question was asked on FB and I wanted to know if anyone else knew and this person made a comment
Well I was able to hotspot from my Samsung phone to my son's iphone. I was connected to the ship's internet and turned on mobile hotspot and my son connected to me and shared my internet at the same time. He was able to stream the cricket live while I was facebooking. Note I don't ever put my phone on airplane mode, and I believe that's why I could do it.
I never use airplane mode when I travel. I turn off data roaming and before leaving Australia I divert all incoming calls to voicemail, which is also set to convert my voicemails to a text message. I update my voicemail message to tell people how to contact me. This way I still get important messages and text messages (which are free to receive overseas with my carrier). For various reasons I need to be contactable when I cruise and this works for me.