Kate Bevan, Which? Computing Editor, said:
“Facebook has taken positive steps to tighten security since this breach but it will still worry users that millions of phone numbers could make it into the hands of criminals – leaving them open to being targeted by cold-calling, fraudsters and other scams.
“If you’ve uploaded your phone number to Facebook at any point, it’s worth being extra-vigilant about calls claiming to be from tech support warning that your computer or router is compromised and other unexpected cold callers. Facebook must also reassure users that their data is being properly protected following this confirmation.”