Analysts at BMO Capital Markets have initiated coverage of wireless network operation T-Mobile Us Inc (NYSE:PCS), with an outperform rating and a $40 price target. The price target reflects a potential upside of 21% above the stock’s Monday closing price. In Tuesday’s pre-market activity, shares of TMUS are steady at at $32.99, and trade within a 52-week frame of $22.95 – $35.50.

Zebra Technologies Corp.(NASDAQ:ZBRA), which manufactures and sells specialty printing devices, has been downgraded by analysts at Imperial Capital to an in-line rating from outperform. The firm as a price target on the stock at $85 a share. In Tuesday’s pre-market trading, shares of ZBRA were inactive after Monday’s close of $84.72, which is near the high end of their 52-week range of $43.92 to $86.02.

E-commerce marketplace Groupon Inc(NASDAQ:GRPN) has been upgraded by analysts at B. Riley to a buy rating from neutral. The firm set its price target on the stock at $9.50, which represents a potential upside of 47% from its Monday closing price of $6.45. Shares of GRPN rose 4% to $6.71 in recent pre-market trading, in a 52-week trading range of $5.18 to $12.76.