State Minister for Posts and Telecommunications Tarana Halim said illegal VoIP call has reduced drastically after the completion of biometric SIM card registration.
She made the statement while addressing a press conference at the secretariat in Dhaka on Tuesday afternoon.
The junior minister said: "The percentage of illegal VoIP was at 35 before we introduced biometric SIM registration but it now stands at only 10% after the completion of biometric registration.
“And for this, mobile phone based crimes has also reduced.”
Tarana said some callers were spoofing to give threats to several eminent personalities.
“Even the law enforcing agencies could not identify the callers as they were spoofing. There is no connection between such types of threats and biometric SIM card registration,” she added.
She said: "If anyone gets such calls, they should call back instantly because by doing this the real owner can be identified.
“We request you not to send money right way after getting such calls."
Public telephone networks often provide Caller ID information, which includes the caller's name and number, with each call. However, some technologies (especially in Voice over IP VoIP networks) allow callers to forge Caller ID information and present false names and numbers.
The government had launched the mandatory biometric SIM/RIM registration on December 16, 2015.