Ways to boost AT&T wireless signal at home

I just put in an Ooma system.  This means that if my Internet goes out we have to depend on cellphones.  We have AT&T but it isn't the strongest signal.  So I'm looking for a way to boost it.  I've seen the AT&T microcells but I believe they need broadband service to work.  Can you advise me as to what options I might have to boost AT&T signals at my home.
Thanks,
Alan
Alan SilvermanOwnerAsked:
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MontoyaProcess Improvement MgrCommented:
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RayData AnalystCommented:
I've personally used this one in 2 different locations with much success.  Naturally, you'd want to get the one 'sized' appropriately for your home.  There DOES have to be adequate signal in the location you place the outside antenna.

http://www.amazon.com/zBoost-ZB545-Signal-Booster-Office/dp/B003VOW5WI/ref=sr_1_1?s=wireless&ie=UTF8&qid=1407774772&sr=1-1
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Alan SilvermanOwnerAuthor Commented:
Thanks,
Al
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