The distinguishing feature of the Vreizon iPhone was that it had the ability for iPhones to act as a mobile hotspot for other devices. This helped the customers to use their iPhone's data connection to share internet with up to 5 Wi-Fi enabled devices such as your laptop or iPad. So now AT&T is planning to introduce the Wireless Mobile Hotspot for iOS 4.3. It's simply up to each individual carrier to decide to support it or not. AT&T did announce support for such a mobile hotspot for other smartphones as well which will be good for iOS 4.3 Users.
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