How to flash (change the imei) huawei modem 829ft?

Don't know how to change the imei on my huawei modem 829ft.
All the videos are old ,those methods do not work. For example, DC-Unlocker does not even see the modem,my modem immediately turned off when the program wants to detect it. Firmware HiLink.
March 23rd 20 at 19:43
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