My iPhone signal at my home is bad. The ATT website shows my coverage in a very god location. Is something like this wrth investing in? Are there other devices? My brother bought a similar product for his T-Mobile cell phone and he says it helps. What other signal improving devices are there? Or is this a gimmick? Thanks!
http://sewelldirect.com/zBoost-Cell-Phone-Signal-Booster-Dual-Band-All-US-Carriers.asp
http://sewelldirect.com/zBoost-Cell-Phone-Signal-Booster-Dual-Band-All-US-Carriers.asp