Can't install 34.4.A.2.85

[disizme]

I can not install 34.4.A.2.85.

Aftel downloading it. Phone reboots with the message, that I can't install it.

[pseudonym]

I would try using the software repair in the Xperia Companion app on a PC or Mac. Be sure to backup everything first if possible (use the backup on the phone to the SD card, or do so using Xperia Companion on the computer).

[Uliwooly]

@disizme

Follow @pseudonym suggestion

Xperia Companion (XC)

Software Repair Guide

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[disizme]

Trying to update using PC Companion I have the massage on PC screen:

"kResultCode_DeltaUpdateResultDidReturnFail"

[Strampke]

If so then read the instructions carefully and pay special attention to the second post of the instructions point 2B.

Report back please if it worked for you.