In case of soft bricked unit (usually ZTE device with VID/PID 19d2:0076) or fully bricked (no sign of life), there is another way to enter the module into EDL Mode.
Here is an image of internal module, the EDL BOOT POINTS are the two one with the red arrows
Special thanks to user checkin665 from eko.pl forumUse a paperclip or tweezer to short these two points, keep them shorted and attach the module to the USB.
You should see into Device Manager (Windows) or lsusb
(Linux) a device in EDL Mode:
- For Windows users, you will have this COM port:
- For Linux users you will have this output:
Bus 004 Device 032: ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode)
Remove the paperclip/tweezer and use QFIL or edl to flash firmware back into the module.