need help fixing imei on SGH-I747M 4.3

I need to repair imei on SGH-I747M with 4.3 firmware.



This is the log I get



Platform: Samsung Android

Selected port: COM34

Selected model: SGH-I747

Mode: Normal

Phone model: SGH-I747

Firmware compiled date: Nov 13 2013

Firmware compiled time: 00:00:00

Firmware released date: Nov 19 2013

Firmware released time: 20:17:24

SW version: M8960A-AAAANAZM-1.0.443100

Old IMEI: 353323-05--------7

New IMEI: 353323-05---------6

Write IMEI failed



(I deleted part of the imei numbers)





Any idea what to do next?



The phone's connected via UART cable.

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