Would this at all be the same with the iPhone 5?
I had a 4s before and 3G was very fast and had full signal nearly all the time with EE. I upgraded to a 5, and on a 4G contract. I now get hardly any signal, I don't get 4G in the area I live but the 3G signal I get is awful, for example it struggles to buffer a youtube video... the casing in the top left is also loose but I've had the phone for about 4 months now so not sure what I am entitled to do about it.