Signal Problem after update

[hoomanino]

Hi,
After update My Xperia Z2 to 4.4, my device lost it signal (can't make phone call or mobile data connection), I did updated my phone to last available software ( 17.1.2.A.0.314) and my problem still exist.

Anybody got the same problem or clue ?

[hoomanino]

ok , downloding , about 1h to finish...

I'll tell u result after flash...

[19667]

ok 

[hoomanino]

I flashed it with flash tool and problem doesn't fix....

[19667]

now check what is ur build number 

[19667]

is this 4n brand new one or other one 

[hoomanino]

17.1.2.A.0.314

[19667]

check ur 4n is locked or not

[hoomanino]

how to check for  lock?

[19667]

go to service menu and check simlock

[19667]

what can u see in there