write cert A800F problem

I wipe and write default efs imei 3500000000006 but after write cert file program show done but after phone reboot imei not change. please HELP

[ 11/1/2016 13:08:00 ] Operation: Write CERT
[ 11/1/2016 13:08:00 ] Selected model: SM-A800F
[ 11/1/2016 13:08:00 ] Software version: 23.9
[ 11/1/2016 13:08:00 ]
[ 11/1/2016 13:08:00 ] ADB device not selected
[ 11/1/2016 13:08:00 ]
[ 11/1/2016 13:08:00 ] Operation: Write CERT
[ 11/1/2016 13:08:00 ] Selected model: SM-A800F
[ 11/1/2016 13:08:00 ] Software version: 23.9
[ 11/1/2016 13:08:00 ]
[ 11/1/2016 13:08:00 ] Waiting ADB device… OK
[ 11/1/2016 13:09:00 ] Reading phone info…
[ 11/1/2016 13:09:00 ] Model: SM-A800F
[ 11/1/2016 13:09:00 ] Android version: 5.1.1
[ 11/1/2016 13:09:00 ] Product code:
[ 11/1/2016 13:09:00 ] Phone version: A800FXXU1AOI2
[ 11/1/2016 13:09:00 ] PDA version: A800FXXU1AOH4
[ 11/1/2016 13:09:00 ] CSC version: A800FOLB1AOH1
[ 11/1/2016 13:09:00 ] CSC country code: THAILAND
[ 11/1/2016 13:09:00 ] CSC sales code: THL
[ 11/1/2016 13:09:00 ] HW version:
[ 11/1/2016 13:09:00 ] Phone S/N:
[ 11/1/2016 13:09:00 ] Modem board: SHANNON333
[ 11/1/2016 13:09:00 ] RF cal date:
[ 11/1/2016 13:09:00 ] IMEI:
[ 11/1/2016 13:09:00 ] Checking Super user right… true
[ 11/1/2016 13:09:00 ] Initialization AT RIL… OK
[ 11/1/2016 13:09:00 ] Checking for compatible phone and cert
[ 11/1/2016 13:09:00 ] Phone KEY ID: 0838
[ 11/1/2016 13:09:00 ] Checking certificate file… OK
[ 11/1/2016 13:09:00 ] KEY ID: 0838
[ 11/1/2016 13:09:00 ] Initializating zTool… OK
[ 11/1/2016 13:09:00 ] Running zTool, please wait… OK
[ 11/1/2016 13:09:00 ] Reading nv data… OK
[ 11/1/2016 13:09:00 ] Checking NV data… OK
[ 11/1/2016 13:09:00 ] Calculating… OK
[ 11/1/2016 13:09:00 ] Writing nv data… OK
[ 11/1/2016 13:09:00 ] Rebooting phone… OK
[ 11/1/2016 13:09:00 ] Write CERT done
[ 11/1/2016 13:09:00 ]

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