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With a rooted phone and an app you can overclock or underclock your processor. Also, off Android, with some hacks you can boost power of a wifi router and wifi antenna. It seems to me that if you can do those things you could boost the reception of your cell antenna some how. Am I right? If so, how?

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Put your droid in a can? ;) en.wikipedia.org/wiki/Cantenna –  Bryan Denny Sep 28 '10 at 15:15
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up vote 1 down vote accepted

As a telecom engineer student, I know that one of the main limitation for power is the EIRP (http://en.wikipedia.org/wiki/Equivalent_isotropically_radiated_power).

Overpassing the EIRP is one of the must known way to increase wifi router power (by adding a better antenna, which leads to an increase in gain, and in power RX/TX). This power is perhaps fixed by the software in Android handsets, and you could use this parameter to leverage the emission power.

But, as far as I know it's illegal (at least in France).

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updating your radio may help (if there is update for your phone). after some search its seems there is.

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BE VERY CAREFUL: you can brick your phone flashing your radio if do not know what you are doing –  Bryan Denny Sep 28 '10 at 13:50
    
...and I don't know what I'm doing, but luckily I knew that before bricking anything. –  Matt Sep 30 '10 at 21:17
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Not really to do with actually altering your reception per-se, but you can update your PRL (preferred roaming list) of your phone for newer cell towers which might give you better reception. On Verizon, dial *228 and follow the prompts.

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