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Attempting update from 2.3.4 to 4.x and the pc companion software keeps telling me my phone is up to date! Anyone know if it's possible to do a manual install?

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what year is your handset? –  t0mm13b Oct 5 '12 at 21:48
    
2011. Last September - it's SI is one of those listed as eligible for an update. I'm guessing it's something to do with my network T-Mobile in the UK? –  rutherford Oct 5 '12 at 21:57
    
FYI - I was constantly refreshing the sonymobile's page to see if my 2011 ST15i's SI number showed up. But no, it did not, it was when I checked Sony's PC Companion suite for an update itself, then after the software got updated, it recognized that the ST15i was eligible for upgrade to ICS. –  t0mm13b Oct 5 '12 at 22:06
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up vote 1 down vote accepted

You can manually install update using Flashtool,and also you need ftf file for it,

http://androxyde.github.com/index.html?1349610344000 -Flash tool

http://forum.xda-developers.com/showthread.php?t=1918920 -ftf file.

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That will not work unless the boot loader is unlocked! –  t0mm13b Oct 7 '12 at 15:26
    
You do not need unlocked bootloader for it. –  Neal Oct 7 '12 at 16:51
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