No 3g or Edge On iPhone after iOS 4 update, Solution Found

Looks like many people are having connectivity issues on iPhone 3GS after iOS 4 update. Lucky me I did not update yet. The symptoms are I updated 3 different iPhone 3Gs and one of them can not access anything over 3g or edge. If I flip on the wifi, I can access the internet. I also performed a reset and erase all settings and content, and still no luck. …
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