The organizing environment is even more challenging for T-Mobile Workers United, a CWA-backed network of call center workers, techs, and salespeople at T-Mobile US and MetroPCS.

In a different call center, Kevin Asuncion transcribed medical visits from half a world away, in the United States. You can get used to the hours, he said in an interview last year: 8 p.m. to 5 a.m.