NOTE: This guide is only for the following Huawei E5372 BOLT firmware versions:

21.270.11.04.1151 (Build: Mar 18 2015, 10:52:54)

21.270.11.07.1151 (Build: -- )

Download Huawei HiSilicon Firmware writer

Launch Huawei HiSilicon firmware writer software

If there is no DC-Unlocker/Rocker/Vygis or Infinity dongle connected to PC, then log in screen will appear. Use your account details to log in, otherwise you have a possibility to access software with free account that will allow you only to detect device

How to get Username/Password check here

Afterwards, Huawei HiSilicon Firmware writer software window will appear

Connect Huawei E5372 to PC. Then wait minute or 2 until it is recognized on computer then click "Refresh" button, wait for device to be detected on software

Click paper icon above Update button

Select firmware file for decustomization. File can be downloaded from DC-unlocker support area which is accessed directly from flasher by pressing button "Enter support area"

Click Update button and monitor the process

At the end a message will appear that flashing has been completed successfully

Now device has not customized firmware in it and ready for unlock

Unlock not completed yet! Click HERE to continue with unlock