Re: Pocket hotspot.
alice, that's called tethering and not all providers allow it.
I've just changed from Three (who do) to Lebara (who don't). So in future when I go away I either have to cope with the small screen of my iPhone or hope that if I take my new tablet there is wifi available.
Those providers who don't allow it threaten to disconnect your service if you try it. I did use it in the past with Three when I took my iPad away, especially in a caravan where there is absolutely no likelihood of wifi anywhere.
Carol, I have heard of pocket hotspots but not got it myself.