I went to the sprint store in Mankato, MN and was told various towers have already been upgraded with 4g LtE in the twin cities area -- in testing stages atm. I asked the lady where she received her info from and said her manager. The manager was convieniently on vacation.
I took that info with a grain of salt. I asked her when 4g LtE was officially released in the first 5 markets and she said back in may. I told her July 15th but she kept insisting it was officially launched back in Ma