Huawei E303 Change IMEI Command

Hello,
I have a Huawei USB dongle and I need to change IMEI via one of these methods: [AT Command / Diagnostic mode / QCDM Command]
I find a tool.exe to change it but I need to do it manually, also I run Serial Port Monitor to see what's the tool is doing ? I capture codes in HEX in Diag mode

Thanks all

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Found Applications port COM4
Found Diagnostics port COM5

Found modem : E303
Model : Huawei E303
IMEI : ****************
Serial NR. : E9PBY*******
Firmware : 22.157.79.02.37
Compile date / time : Sep 5 2012 13:57:36
Hardware ver. : CH2E303SM
Dashboard version : HiLink12.012.02.03.37
Web UI version : HiLink12.012.02.03.37
Chipset : HiSilicon
Voice feature : not supported in current firmware
SIM Lock status : Locked (CardLock)
Wrong codes entered : 0 (unlock attempts left : 10)

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