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[rsanns]

After flashing a firmware with flashtools, I lost my network signal. I used the xperia companion, flashed again with flashtool, but don't worked.

 

I think this happening when I flashed with simlock.ta (un)checked... I don't remember.

 

How can I fix this/? Please.

[Jurij]

If you do not have trim area backup from working state - only customization in authorized Sony service centre can help or main board swap from working phone.