m8 update after no network need help


hello sir plz help me here my phone info
M8_WLV PVT SHIP S-OFF
CID-11111111
HBOOT-3.19.0.0000
RADIO-1.09.20.0926
OPENDSP-V46.2.2-00564-M8974_FO.0811
OS-3.31.512.2

BEFORE HAVE KITKAT VERSION WORKING FINE I UPDATE marshmallow after no network
plz help how to solve