GP, Robi, Banglalink, Airtel, Teletalk & Citycell SIM registration ordered by Government Here the simple way to register to avoid connection termination as Government notice to re-register all existing SIM of all operator. You can do it either SMS or Online, although SMS is the preferred way as there would be much more chaos in customer care center. This sms process is valid for those SIM purchased after 2012 & also earlier subscriber may check their status. If you fail to register by this process, you have to register via Biometric Method which will be available from 16 December. SIM Registration By SMS