I have a very poor mobile reception in my house. So has my next door neighbour. I'm on Tesco Mobile which I understand piggy-backs on the O2 network. This poor signal also applied when I was on Vodafone, and it also applies to all visitors to my home (irrespective of network). Is there an O2 booster I can buy which will give me a working mobile signal in my house? At present, I walk to all 4 corners of my front and back garden, in an effort to get a decent signal, and that does not always work either. Thanks.