Hi Eric, and thanks for your reply. While using the iPhone as a wifi hotspot directly is possible – and indeed what I currently have to do when there is no other connection available – there is a lot of manual hassle, inflexibility and limitations with that solution.
TLDR: Iphone + router becomes in effect a mobile broadband router, which makes handling the internal wifi in the summer cottage endlessly more convenient than only relying on the iphone hotspot.
Whole enchilada:
Compared to a router to which your devices can connect automatically there are a lot of manual steps involved (I typically need to pick the iphone wifi manually every time I open up the lid on my computer or turn on the apple tv); many devices (like my windows computer) have a hard time finding the network, requiring me to switch the iphone hotspot button off and on several times or even restart the iphone; and the iphone signal is very much weaker than even the simplest of routers.
The upshot here is that the iphone hotspot feature is an excellent emergency or on-the-road choice because you always carry it with you. But for any kind of stationary connectivity solution it is really, really limited. That is of course fine, as long as you can connect it to other products which ARE made for what I am trying to accomplish here.
My actual use case is our summer cottage. We have always used the hotspot feature here, but with the kids getting older there is just a much larger drive for connected devices: TV, apple-TV, the kids’ ipads. And then the manual hassle with the iphone hotspot is just multiplying.
Thus the need for a proper router to which I can plug the mobile phone. With this marvellous device in place I can connect ALL the other devices to the router, where they stay connected come rain and come shine. And then just plug the iphone to the router. Apart from having one stable internal network, there is also a huge flexibility on the “feeding” end. We have four iphones in the family, and with this solution we can just connect any one of them to the router, where it will be charged and feed the rest of the internal network. Bingo.
In other words, what I want to do create a mobile broadband router. Why then not just buy one of those? Indeed I would, if not my mobile company wanted to charge me a non-trivial monthly fee for that setup. And there just goes my limit. I accept, of course, a one-time charge for the hardware (a sim and/or a mobile router), but adding yet another monthly fee for what I can already do (if less convenient) is just too much, given that we are already paying for (i) two unlimited plans, (ii) additional monthly fees for adding the two kids’ phones, as well as (iii) our two apple watches.