WMLongLife v0.2 (PPC Application)

Using 3G is nice, but the radiation may prove harmful. Besides, less radiation === less power === less battery usage. So you can save some battery as well. Why use 3G when 2G suffices? And that is exactly what WMLongLife does, use 3G when you need it, and 2G when you don’t.

http://forum.xda-developers.com/showthread.php?t=478519

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