I suppose your phone having cid49(2years)

try setoolite v1.11.
install appropiate driver.

on setoolite,
select phone model(w810),
press unlock/repair button,
connect phone with 2+5 pressed.

after that,full flash the phone with appropite flash files+ cust packs.

ps/
if driver install prompt,install it properly.

mine was nec 1.8ghz amd turion ml 34 lancester socket 754,1024 l2 cache,dd2 256 mb ram las 2.5,3,3,7.