No...My DH did not "have" to be out of the cabin. Yes, we could have both been on our phones...but that wasn't what we needed. At times I was texting family on my iPhone and researching new cruises I was going to be booking onboard etc. etc while he was at the pool or the SL. This was the first time we have even thought about a Hotspot but it worked.
We had the Voom S/S pkg with two devices.
I have no idea how DH did this but it worked.