S3 LTE I9305 SN Repir problem

heres my log:



Selected model: I9305

Selected port: COM35 Z3X BOX Serial Port

Selected port speed: 115200

Checking phone at COM35

Repairing SN... OK

Repairing network settings... OK

Reseting... OK

Repair done

Done with Samsung Tool v.15.9



The software say everything okay, but the s/n not changed in the phone.

I probe 3 different firmware.



Whats wrong. Plz help.

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