[Q] (Q) how to make wifi better

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Ok I tried the motorola Atrix the other day. And I saw that it comes with a better wifi app or signal receiver. I would like to know if some one knows how to make our wifi better or flash custom the atrix wifi app, to see it works better. I have a VIZIO router at home the Inspire just reads the VIZIO signal which runs at 2.5ghz And there is a option to run VIZIO HD which runs up to 5.0+ ghz. But the only device that ever read it was the Moto Atrix, sadly it isn't mine. Although I like the Inspire mutch better. If any one knows I would appreciate some suggestions. I'm doing my own research if anyone interested.