lg ls676zva not unlock

LG 2-3G Tool v9.48
supported models: 1555

Mode: Emergency
Model: LS676
Read info...
Laf Protocol: 01000004
Model name: LGLS676
Software verion: LS676ZVA
Android verion: 6.0.1
Target operator: SPR
Target country: US
Chipset: msm8909
IMEI: 30000000000000
Elapsed: 5 secs. --> (v9.48)

Phone mode is DOWNLOAD
Start new sprint unlock...
Laf Protocol: 01000004
Model name: LGLS676
Software verion: LS676ZVA
Android verion: 6.0.1
Target operator: SPR
Target country: US
Chipset: msm8909
IMEI: 30000000000000
Init EXT4 /system ...
Detecting sprint type ... using old write method...
Laf cmd info: send LAF_CMD_IOCTL, retry #1
Laf cmd info: send LAF_CMD_IOCTL, retry #2
Laf cmd info: send LAF_CMD_IOCTL, retry #3
Laf cmd error: LAF_CMD_IOCTL could not write.
Elapsed: 238 secs. --> (v9.48)