UC20 QNWLOCK take effect immediately

What are steps to lock a UC20 module to UARFCN/PSC and take effect immdeiately. Everytime I attempt to lock module, I have reboot device to allow AT command to take effect. the command I’m using is:

UC20 can not support this function. This command cannnot apply for UC20 module, it just used for LTE module to lock LTE .Thanks!