My partners parents have a house in Spain. We are in a small spanish village just off the coast and the signal at the house is very poor. there is one section that gives you a tiny bit of signal but as soon as you pick up the phone you lose it. the village is a half mile away and get perfect full signal there. is there something i can get that will boost the signal there such as an antenna. we are on a mountainside so getting an aerial or something up high would not be a problem. any help would be appreciated.