I have been with Three UK for over 4 years and have been quite happy with them. They were the cheapest to begin with and offered great deals but ever since they started getting network quality awards and #MakeItRight they have gone south in my books.. An S5 package I got for my wife in 2014 costs me £28pm but if I get the same again with S5 (which is 2 years old now) it will cost me £43!!!! So I am ready to jump ship. I currently have a sim only plan with them and pay £12.90 for 200min, 5000txt and Unlimited Data however all good things must come to an end. They just wrote to me that package price will become £20 from next month which I think is ridiculous. I don't need many minutes but use a lot of data (6-12GB) but can probably do with less .. never bothered with WiFi as there was no need. I am looking for alternate plans with other networks and was wondering if there is any particular one I should avoid. So far all fingers point to EE being the worse in terms of signals. Interestingly I have heard GiffGaff gets bad connection in the same area where O2 gets perfect signals even though they are both the same. What do you guys say?