Band Lock in EC25 Module

Hi,
im working with EC25-E Module and i want to lock LTE Bands.
when i try it with AT+QCFG=“band”,0,0x40,0 the module returns Ok but aftrer i query the current settings,its not changed.
in other test, i restarted the module after AT+QCFG=“band”,0,0x40,0 command but i get the same result.
can you help?

Screenshot from 2021-11-18 08-06-35 !

You need to drop the 0x when used in the set syntax:

AT+QCFG="band",0,40