EM919x/EM7690 - AT Command Reference - +CTZU declared as not supported but works on EM91

IoT Modules MC/EM Series
1

In the AT Command Reference document, the CTZU is declared as not supported but on my EM91, the command is accepted and seems to activate the NITZ feature: The Hour on CLK is equal to the local time.

Could you please clarify the support of this feature on these series please ?

Thanks

2

if AT command user guide says it is not supported, there will not be any verification and validation on this command.