Federally, a beer with under 0.5% alcohol isn't considered beer. But states have varying laws on N/A beers, which is likely why RC still lumps them into the alcohol package.
The only time I've seen a concierge say something to guests regarding attire was during a happy hour when a group showed up straight from the pool, complete with towels.
Wifi calling and text message don't always play well together on a ship. I think it may have something to do with different carriers for your recipient.
But if you need guaranteed receipt, use WhatsApp or the like