tested hint to unlock v551j here

i hope that help all

i unlocked v551j today by that step


that info for phone

Model V551J
IMEI 355605000171881
User code 1234
Security code 000000
Operation band GSM 900/1800
Firmware R472_G_08.18.16R_0A
Flex version GSPSAN2M0CIN03NA0D3 - 1.0.1.5.1.D.2.5.7.
Language pack 0003
US English, Canadian French, American Spanish, Brazilian Portuguese
1- read backup flash phone (u can read buckup flash without test point)
2- open phone and make test point u can find @ www.boot-loader.com
3- make searsh at smart moto after make test u will see your phone
4- now go to unlock tab u will not find that model v551j select anther model v557 and make unlock via testpoint
5- wait to proccer unlocking to can see unlock done
as at my log

SmartMoto 1.23
Clip serial: xxxxx, version: 2.26, initializing... OK
Searching for phone... found S Blank Neptune LTE, getting test interface... interface not found
Switching to flash mode... OK
Searching for phone... found S Blank Neptune LTE, getting test interface... interface not found
Switching to flash mode... OK
Searching for phone... no phone found
Clip serial: 899030214, version: 2.26, initializing... OK
Searching for phone... found Motorola Phone (V551J), getting test interface... OK
Model V551J
Firmware R472_G_08.18.16R_0A
Reading info OK
Searching for phone... found S Blank Neptune LTE, getting test interface... interface not found
Switching to flash mode... OK
Reading phone boot version... 0.FF
Reading flash id... Intel-28F256L18B
Phone group: A630,E1,E37x,E39x,E55x,L6,U6,V3,V190,V330,V53x,V54 x,V55x,V62x,V635,V80
Hardware IMEI: 355605000171881
Security area saved to "S Blank Neptune LTE 355605000171881.pds"
Writing section0 done
Turning phone off... OK
Searching for phone... found S Blank Neptune LTE
Switching to flash mode... OK
Unlocking phone... OK


i hope that help all users
thanks for all members