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]

[19667]

i cant see that pic can u send it into my email

[19667]

there is no simlock problem please turn off ur 4n and remove ur sim then clean it and inset again and check

[hoomanino]

nothing changed 😕

again  invalid card - emergency call only....

[19667]

have you try to use another sim and whats happen

[hoomanino]

yes and nothing changed...

[19667]

if u can u better downgrade it to 17.1.1.A.0.402 hk version here and flash it with that and try 

[19667]

Or repair ur divece with PC companion i think this will u do 1st

[malakhi]

Hi
In my work place only 2g network available. sony phones lost theire network signal but nokia, samsung and huawei phones have good signal and can use internet
I check all phones have same 2g band support
I hope sony check this problem and rework on it
Specially z2 and z3
Sorry for bad english