I have an iPhone 4 with AT&T service. The signal strength in our home in St. Charles was usually either one bar or no service at all. Recently I received a letter from AT&T that offered me a free AT&T 3G MicroCell (supposedly a $199 value). I picked it up at the AT&T store, installed it, and now we have great reception with four and five bars throughout our home. The 3G MicroCell works great. Check with AT&T if you haven't already received this offer in the mail. Maybe it would solve your reception problem when you are at home.
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