Security Researchers have found a privacy bug in the Caller ID App giant, TrueCaller.
This bug puts the personal details of about 100 Million users at risk.
As mentioned above, this is due to TrueCallers utilization of the users IMEI number for identify the user.

Truecaller uses devices IMEI as the only identity label of its users.
and tamper app options without users consent, exposing them to malicious phishersstatessecurity firm.
Security firmstatedThis vulnerability allows anyone to steal Truecaller users sensitive information, potentially opening doors for attackers.

Overall, more than 100 Million Android users who have downloaded this app on their smartphones are in danger.
