iPhone gurus 3G and 4 questions

stang50

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I recently activated my old 3G due to cracking my 4 screen. Seems as if these things are almost useless these days. My software is at 4.2.1 and iTunes says that's the latest available, but a lot of my apps are out of date and can't be updated.

Also the guy that fixed my screen gave me back the phone and wifi does not work at all. So now the 4 has no wifi capability, which I depend on a lot. Any input? Thanks
 
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