If you just connect a router to your iPhone, then the Internet should be free.
You get faster internet then the original iPhone.
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yes there is unlimited texting on the iPhone 3gs and the iPhone 4.There is unlimited texting on all iPhones.
It depends on the app. Most games don't require internet, but apps like Facebook, Safari, email, and others do.
does the iphone 3 have to have internet to work.
if you have your iphone connected to the internet then technically yes however you are not actually using any internet if the application does not require the internet. for example, games like angry birds do not use the internet unless you want to add your high score to the online leader board which would use almost no internet anyway. other things like shazam, the facebook app or any almost any game that has 'live' on the end does require internet. I hope this helps :)
Yes, it costs extra for the internet on the iphone.
The iPhone has its own Service Plan which has Internet included.
yes, you can just use wifi access to use the Internet on your iPhone
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Yes it is, it allows you to access the internet, download apps and has an operating system.