State Minister for Post and Tele Communications Tarana Halim said, ‘Biometric registration of mobile-phone SIM cards will continue till April 30. After the day unregistered SIMs will be deactivated and later switched off gradually.’The State Minister said this after opening biometric SIM registration activities at her own office in the Bangladesh Secretariat on Tuesday. Tarana Halim said, ‘The people who did not register their SIMs yet, they should complete the proceedings within this time.’