Default new update tx lt29 5.4.A.0.20

Today i recieved but i cant download even with wifi or data give error
Could someone can download confirm which is improved
My xperia is tx lt 29 has jb 4.3 oficial fw no rooted all in stock,
Im in peru

In update says
Update for kit kat
Improves system
An album app

What i see is the same update for
Xperia z, zl in other forum here on xda

Sorry for my bad english
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