The network confirms it has a deal with Huawei and others, but says no data left users' phones.
The technology giant's owner Meta said platforms like TikTok were hurting its growth.
But Facebook owner Meta is struggling with its slowest revenue growth since at least 2012.
Job interviews can now take place in VR worlds with a computer asking the questions.
Alan Turing's codebreaking activities in the Second World War may have saved millions of lives.
Microsoft has been forced to stop calling the Windows 8 interface 'Metro' because of potential legal problems.
The BBC talks to Facebook's director of AI about what the social network is doing with the technology.
Papua New Guinea aims to crack down on fake profiles and may make its own rival social network.
It says fake news is not against its "community standards".
The platform says it has taken down 30,000 videos since its ban on false vaccine claims in October.