Hi, My preference is a good mobile for WiFi hotspot -- the right radios for the /right/ network that you need to use. Nothing else much matters for the hotspot device, other than it should have updates for the software to keep it reasonably secure (as secure as a mobile phone can be). It's a bonus if it us good otherwise and/or if it otherwise provides for all other mobile needs. The non-phone devices, all that they need is WiFi. And any device for mobile phone calls, well it needs the right network to be useful for any location I'm in (for calls, not data). I had a 6GB data mobile plan with unlimited standard AU calls, dropped that down to a 3GB data plan with unlimited calls. On my hotspot phone, I nnow have 50GB of 4G LTE data. The phone plan mobile (with 3GB now) rarely does data other than as a WiFi client via the hotspot; occasionally I need to turn on data for MMS, which is a pain. So, 53GB of mobile data never gets close to be used, but I also never have to worry about going over my limits in normal circumstances. If I needed more data, I have other options (on the road I mean). As for fixed line services, I have unlimited data, but even then due to the huge amount of mobile data available to me, I don't even worry about switching back to non mobile data these days when that is served via hotspot to other portable devices -- except for the laptop, that plugs in to the wired network and WiFi is switched off. Almost all my more serious "data" work is done from fixed wire connections. I'm not a big fan of using mobiles more than necessary, but it is handy having plenty of data available if or when I need it from time to time. Whenever I want mobile tablets or laptops on the road, then it is very easy to connect to my regular hotspot phone and therefore those other devices have no need for any 4G SIM slots with possible /less good/ radio connectivity. SIM slots are only useful, in my view, for devices that make calls or devices that offer me hotspot services. I actually