T-Mobile COO shares where the company can 'do better'
He believes the Un-carrier has room to improve and to continue disruptomg the wireless industry.

Under longtime CEO John Legere, T-Mobile often seemed like a company engaged in a fight its opponents did not want to be part of.
Legere, at least at the start of his tenure, was running the last-place wireless phone carrier. He slowly built his customer base by calling out his rivals for all the terrible things they did to their customers.
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Prior to T-Mobile becoming an upstart player, AT&T and Verizon essentially shared a monopoly. Neither company wanted to kill the goose that laid the golden eggs, so they were unwilling to do things like drop overage charges or get rid of contracts.
T-Mobile essentially had nothing to lose. Legere slowly got rid of all the things consumers did not like about their cell phone provider.
He made his company consumer-friendly, and that actually forced AT&T and Verizon to do the same.
Legere would likely go down as a member of the CEO Hall of Fame, if such a thing ever existed. When he left the company, it created a bit of a void.
T-Mobile had always been a personality-driven business, and current CEO Mike Sievert does not share his predecessor's flair for performance. That doesn’t mean he’s not a good CEO, but T-Mobile no longer racks up the free publicity it used to earn.