Many have said here that your data plan will be grandfathered to the new phone. However I read this on Market watch. Upgrading can also come at a price, including upgrade fees of roughly $30 and the elimination of old unlimited-data plans. Plus, as The Wall Street Journal recently reported, consumers using a 4G LTE connection tend to consume more data1.2GB per month, versus 500MB for those on slower connections. Not everybody needs all of those different small bumps up to iPhone 5, Satyavolu says. It comes down to personal choice. There will also be a $30 extra charge for the plan??