T-Mobile US CEO John Legere says Verizon Communications' (NYSE:VZ) Go90 mobile video service could be a "debacle," and that cable TV firms such as Comcast (NASDAQ:CMCSA) might need to buy a wireless phone company to stay competitive.
Analyze the relationship between 'Go90' and 'Verizon' within the context of the input sentence.
Options: director/manager, owned by, business division, manufacturer