Use usb_modeswitch to force modem mode over storage mode [1].
: Offers scripts to "make the MF910 play nice," including scripts to disable Wi-Fi or manage modem modes via the terminal. Security Warning zte mf910 firmware
Researchers have identified debug endpoints within the firmware that could potentially be exploited, making it a popular choice for hobbyist "reversing" but a riskier choice for sensitive data [3]. Use usb_modeswitch to force modem mode over storage mode [1]