Cannot enable ADB

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RG520N-EU - enable ADB

Hi folks, I have a RG520N, firmware RG520NEUDBR01A04M8GA, and I am trying to enable ADB, but I cannot detect it from ADb tool I understand should be the sixth bit in +QCFG: “usbcfg”,0x2C7C,0x0801,1,1,1,1,1,0,0 is this correct ? Do I need a key for unlocking ADB? Running AT+QADBKEY? returns an error. Thanks in advance

vedi codice pid, vid
vendor che differisce.
Poi sblocca.