I'm in SE Lower Michigan and for the past 2 days the data speeds are awful. Prior to that they were excellent and now all of a sudden, nothing. Anyone else having issues? ATT told me there are no known issues. I've reported them at both my house and work locations. I can't imagine it's the 4S as it just came on, rather quickly. Any thoughts/suggestions welcome UPDATE: Uh oh, just tested my daughters 4 and her speed is awesome. What could have happened to my 4S???