True Move has asserted that it would shift about 17 million users from its 2G network to 3G/4G network within four months. The operator is required to surrender the spectrum in the 1800 MHz band in September 2014, before which subscribers need to be migrated to different frequency band. Subscribers can be shifted to different networks through either mobile number portability or SMS notification. In the latter method, subscriber receives an SMS from the operator seeking permission to transfer it to a different mobile network. The operator intends to migrate users through the method of SMS notification.