Unlock LS777 ZVH ?

Reading timeout, check cable
Error Code: ReadInfo,1,1
Elapsed: 2 secs. --> (v9.60)

Mode: Emergency
Model: LS777
Read info...
Laf Protocol: 01000005
Model name: LG-LS777
Software verion: LS777ZVH
Android verion: 7.0
Target operator: SPR
Target country: US
Chipset: msm8937
IMEI: 35547XXXXXX6820
Elapsed: 4 secs. --> (v9.60)

Checking Login and Password... OK
Ballance: 15 crd.
You have 15 credit(s) left. This operation takes 5 credits.Continue? Yes
Searching modem interface... found COM72
Reading data from phone... error(2)
Elapsed: 11 secs. --> (v9.60)



Phone mode is DOWNLOAD
Start new sprint unlock...
Laf Protocol: 01000005
Model name: LG-LS777
Software verion: LS777ZVH
Android verion: 7.0
Target operator: SPR
Target country: US
Chipset: msm8937
IMEI: 3554XXXXXXXX820
Init EXT4 /system ... done
Detecting sprint type ...
Laf flash error: phone is not supported.
Elapsed: 31 secs. --> (v9.60)