According to a report from iMore, Apple's next-generation iPhone will debut sometime later this year with support for 4G LTE network connectivity, and the same, "Retina" 3.5-inch display. Earlier this week, one report claimed that the next iPhone will actually sport a larger display, which has been rumored for a couple of years now, but it was quickly shot down.
So to sum up, iPhone 5,1 is on track for:
- Similar if not same sized screen (currently 3.5-inch but not set in stone)
- 4G LTE radio
- New “micro dock” connector
- Fall/October 2012 release