I'm pretty much assuming the iPhone in 2012 will go to LTE. Right now, LTE is very limited, and data only. By 2012, there should be enough widespread deployment, and voice will likely be figured out by then.

What I'm curious about is if Apple will use the fake 4G term, by having the 2011 phone show 4G in the status bar when connected to a higher speed HSPA+ network. To me, I still think it's a marketing sham. But, if they don't go along with it, some consumers might fall for the 3G/4G trap and start avoiding the phone.