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US Cellular tells the FCC it's doomed without the T-Mobile acquisition
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
I had a better experience with T-Mobile back in their un-carrier days. Once they dropped that facade and started matching the other two I noticed a dramatic shift in pricing and support.
I don't know when the merger rules with Sprint expired, but I would guess it was probably around the same time.