My company is changing to Verizon, so I will soon be getting my new iPhone4. I checked the map and my home is just outside (by a 100' or so) the coverage area. We are on the bottom of a hill, which is why we lose signal. Is there anything I can do to boost or enhance signal here? Maybe put an antenna on the chimney to catch the waves and rebroadcast in the house? I do a lot of business from home and need my cell. Help!!!