EG912Y SMS tx problem when voLTE is enabled on SIM-card

Hi,

I have a problem with the module EG912Y version EG912YEUAAR01A08M16 when I try to send SMS messages from the modulo EG912Y (with simcard TIM volte) to a phone (with simcard TIM volte) only when the volte is enabled in both the simcard.
The problem is that the command "AT+CMGS= … " return ERROR.

If volte is disabled all work.

What can I check?

Thank you,

Stefano

Hi
Please refer to the following process to send SMS, thank you
image