Photo: FactWire

Truecaller, CM Security, and Sync.ME, three popular caller blocking and ID apps used by millions of customers, have just been outed for storing the contact details of three billion people in publicly searchable databases. According to Digital Journal, research published earlier this week by Factwire, a group of investigative journalists in Hong Kong, said that the mobile phone numbers of politicians, celebrities, and billions of other people, can be found via searches on the app publisher’s websites.