It has been on and off in NE Mpls and the u of m campus. Now it is consistently on. Areas tested and confirmed with LTE:
North St. Paul
Maple wood
Woodbury
Eastern Eden Prairie
Plymouth
Northeast Minneapolis
Dinkytown(on since the fair)
MSP airport(on for a while)
Downtown Minneapolis
Roseville
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Average LTE speed so far is 17 Mb down and 21 up in the past 12 hours.