The Centre for Research on Multinational Corporations and Students & Scholars Against Corporate Misbehaviour conducted an investigation and found that 500,000 workers at the Shenzhen and Chengdu factories, which manufacture iPhone and iPads, are subject to inhuman working conditions.
The report has said that overtime is much more than the legal limit of 36 hours a month. Further, workers who did not perform well were publicly insulted.
Source: Medindia