Team need help on this topic

Dear team when ever i reapir imei thru usb its show sucessful but when i reset phone the old imei back again, is this bug or what, recently i reapir gionee f103 imei repair log shows sucessful done but when i reset fone its come back old imei ??

1. Power off the phone.
2. Please insert USB cable within 20 seconds.
>>Hardware version:CB00
>>Software version:0000
>>SecCfgVal :0x00000000
>>BromVersion :0xFF
>>BLVersion :0x01
>>Boot downloading complete!
>>EMMC_PRODUCT_NAME: 0x513832334D42
>>EMMC_BOOT1_SIZE: 0x00400000
>>EMMC_BOOT2_SIZE: 0x00400000
>>EMMC_PRMB_SIZE: 0x00400000
>>EMMC_GP1_SIZE: 0x00000000
>>EMMC_GP2_SIZE: 0x00000000
>>EMMC_GP3_SIZE: 0x00000000
>>EMMC_GP4_SIZE: 0x00000000
>>EMMC_USER_SIZE: 0x3A3E00000(14.56 G)
>>Detected : MediaTek USB Port (COM9)
>>Find partition success.
>>Check the data complete.
>>Write IMEI successfully!

this is log

help me team