Verizon does not support the iPhone, AT&T does. The iPhone has over 100,000 apps available for download and many are free or 1.99 or less. You can use the internet while on the phone when using AT&T's 3G network. Not so on Verizon.
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In order to get the mail forwarding option you have to upgrade to the paid version of Yahoo Mail called Yahoo Mail Plus. The free version does not allow forwarding. You could just give your phone email address instead of your yahoo address.
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