Unable to get all networks mkr nb1500

Hi there i am using MKR 1500 NB. I want to send the SMS. After several searches I managed upgrade the ublox with ublox software manually. now network search is showing Carrier name of 4g volte service.. But it isnot showing all carriers. How to update the ublox with current up gradation so that I can get all the carriers. with modem registration with carrier.