Firstly, if Orange are messing you around, why not buy your Orange Iphone 5S from Carphone Warehouse? Have just checked online and they are in stock and will almost certainly be cheaper than Orange. I have previously owned Samsung Galaaxy S2, S3 and S4 but as the rest of my family are all Iphone 5 I bowed to the inevitable and I have to say I am really pleased with my 5S. Reception is much better than the S4 and battery life is two to two and a half days, again much better than the S4. I had an Experia Z1 - very attractive and fast, slightly on the large size, but I found at work where i got 1 bar with the S4 and now get 2 bars with the 5S I could get no signal at all, I exchanged the phone at Vodafone for an identical model and it was exactly the same! No experience of the HTC One other than that from reading reviews a lot of people find Blinkfeed very irritating!
OnePlus 5 review