Well long story but managed to get a new phone cheap on a deal with Vodafone a Sony Xperia - anyway was with O2 and did not give a thought to signal as thought if O2 signal was good Vodafone would be to....
errr and that was a NO - my vodafone signal inside and outside my house was 95% off most of the time

Anyway made a complaint and after threat to quit contract under "not fit for purpose" they try'd to get me to buy a sure signal home booster for 60 - anyway after another threat to quit I got it free

sure signal.jpg

Anyway its just a plug top that plugs into your router mine is hanging off a powerline adapter as wanted it upstairs, after registering the unit on vodaphone website its all free usage and now I have 5 bar mobile signal in and outside house - well impressed..........

anyway by the looks other providers have similar solutions so if you have a bad signal worth a go !!!