At least 13 phone companies around the world have been compromised since 2019 by sophisticated hackers who are believed to come from China, a cybersecurity expert group has said. The roaming hackers – known as LightBasin – were able to “search and find” individual mobile phones and “target accordingly”, according to CrowdStrike, a group regularly cited by western intelligence. Hackers were also able to obtain personal subscriber information held by phone companies and metadata showing who made and received calls. “Sophisticated signals intelligence activity” aimed at phone company networks has…