
Shares of wireless carrier T-Mobile TMUS.O fall 1.8% to $231.8 premarket
Brokerage KeyBanc Capital Markets downgrades TMUS to "underweight" from "sector weight"
"We think TMUS's consumer value prop has deteriorated due to recent pricing actions, which suggest TMUS shouldn't take outsized share of the industry net adds," brokerage says
19 of 30 brokerages rate the stock "buy" or higher, 10 "hold" and 1 "sell"; their median PT is $271
Up to last close, stock had risen 6.9% YTD