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Interface Driver | Zte At
sudo usb_modeswitch -c /etc/usb_modeswitch.d/19d2:1403 sudo modprobe cdc_acm sudo modprobe option sudo modprobe qcserial # for newer ZTE LTE modules Step 4: Verify AT Port After switching, check:
usb 1-2: ZTE MF833U1 Modem (CDC ACM) → ttyACM0 (AT) usb 1-2: ZTE MF833U1 PCUI → ttyUSB1 Create /etc/udev/rules.d/99-zte-modem.rules : zte at interface driver
ls /dev/ttyUSB* # or /dev/ttyACM* dmesg | grep -i zte Typical output: sudo usb_modeswitch -c /etc/usb_modeswitch
TargetVendor=0x19d2 TargetProduct=0x1405 MessageContent="5553424312345678000000000000061e000000000000000000000000000000" Then trigger switch: zte at interface driver