OPPO

This company received a grade of F in the Greenpeace Guide to Greener Electronics (Oct 2017), which assesses companies from the electronics industry across three impact areas: energy use, resource consumption, and chemical elimination. Of the 17 companies ranked, this company came fifteenth.
Source: Greenpeace (2017)

The Chinese government has facilitated the mass transfer of Uyghur and other ethnic minority citizens from the far west region of Xinjiang to factories across the country. Under conditions that strongly suggest forced labour, Uyghurs are working in factories that are in the supply chains of at least 83 well-known global brands in the technology, clothing and automotive sectors, including brands owned by this company. The Australian Strategic Policy Institute's 2020 report estimates (somewhat conservatively) that more than 80,000 Uyghurs were transferred out of Xinjiang to work in factories across China between 2017 and 2019, and some of them were sent directly from detention camps.
Source: ASPI (2020)

This company received a score of 22/100 (retrieved 10-Oct-2020) in the Corporate Information Transparency Index (CITI), a system for evaluating supply chain practices in China, particularly in regards to environmental management and water pollution. Scores are calculated using government compliance data, online monitoring data, and third-party environmental audits, as well as trends in the environmental performance of factories in the company's supply chains.
Source: IPE (2020)

In 2022 India's finance ministry, said that Oppo's India unit evaded customs duty of $550 million. The finance ministry said it found evidence that Oppo India "wilfully" wrongly declared description of certain items it imported in the nation, which allowed it to improperly avail duty exemption benefits of $374.3 million. Additionally, Oppo India also made royalty and licence fee payments of more than $176 million to other companies, including some in China, and did not disclose those transactions in the value of goods imported by them, violating the country's Section 14 of the Customs Act, 1962, the ministry added.
Source: Tech Crunch (2022)