I want to buy a wireless signal booster for my cell phone. its a treo 650 and its unlocked . i have very bad signal in my house and get a lot of dropped calls. I am talking about those little stickers that come out on TV and they have them at Fry's Electronics and at Walgreens and other places. Do they work? or should i not buy it. I dont want to spen 100 dollars or more on a home based signal booster so they are out of the question