Disclosed on August 21, NESTOR CANO, EVP at T-Mobile US (NASDAQ:TMUS), executed a substantial insider sell as per the latest SEC filing. What Happened: A Form 4 filing with the U.S. Securities and Exchange Commission on Wednesday outlined that CANO executed a sale of 8,500 shares of T-Mobile US with a total value of $1,676,285. As of Thursday morning, T-Mobile US shares are up by 0.2%, currently priced at $195.85. Delving into T-Mobile US’s BackgroundDeutsche Telekom merged its T-Mobile USA unit with prepaid specialist MetroPCS in 2013, and that firm merged with Sprint in 2020, creating the se…