I was trying to be polite, let's be a little more direct, most of your last post was complete nonsense and of no bearing to anyone not living in your house or on your street. Let me answer your last post a little more directly.
Nonsense, Three have good to excellent coverage in many areas outside if towns. All networks have areas of bad coverage.
Nonsense, they share all 3G masts that EE own (somewhere between 12000 and 14000 masts).
Again nonsense, it's well accepted by anyone in the industry that from a pure signal point of view, neither EE nor Three can compete with the legacy 900MHz networks of Vodafone and o2. That's the reason why most government departments, the police and the British Army still have mobiles on one of the two old networks.
For a 3G signal, EE and Three are pretty good, EE can seem better because it will fall back onto 1800Mhz 2G signal in places of no 3G, but for all the use EDGE is you may as well just be on O2 if plain calls/texts are what you equate to "good signal".
EE had a large head start with regard to 4G roll out, so it currently has a large lead from a 4G point of view (but even they are largely urban when looking at 4G coverage). It is reasonably pointless to compare 4G when all the networks are rolling out new sites on a daily basis and what has poor coverage today could be good coverage tomorrow, 4G will also see significant improvement in the near future with both EE and Three in the process of bringing 800MHz spectrum on line.