How to manually update, root, downgrade 2012 Xperias

[uliwooly-wooly]

How to manually update 2012 Xperias to Android 4.0.4

Click on one of the topics

• Prepping
• Back up current firmware
• Flashing
  
• Downgrade
• Video tutorial on flashing
• Warranty & Rooting

as always thanx XDA forum

Rooting "might" void your warranty. I'm not responsible if anything happen to your phone (nothing should go wrong,, if something do go wrong, just repeat the whole process).

[Zohayb]

I have a couple of questions would you recomend an install wiping out data in the phone or without wiping out?

and if wiping data is to be used would you recomend moborobo for backup? can the data be restored by it?

[utsavshah]

Will it void my phone's warranty if i flash this ftf with flashtool?

As my current region is India.

[emrahozdemir]

is the SI number important for manuel update?

i click the flash button and chose the 4.0.4 ftf file but firmware content part was empty.

what is wrong?

[Tharik]

Hii uliwooly

Please guide me...

1.Is the Update ICS 4.0.4 via flash tool and the official one are same????

2.So far how is the performance after updating 4.0.4 via flash tool???

3.I already downloaded the ftf file shall i proceed via flash tool...will it affect my warranty?

kindly answer me......:smileyhappy:

[clinta12]

Do i have to unlock the bootloader and root my phone before flashing with flashtool. Or will the flashtool work with locked bootloader. I do not want to unlock bootloader as yet. Waiting for your reply

[clinta12]

Dial *#*#7378423#*#*

Select Service Info

Select Sim Lock

If you see all zeroes I believe it is complettely unlocked

[Garret141]

I was lucky, my Xperia wasn't locked. Just used flashtool and within 5 minutes, job done.

SI number is not important as far as I know. Maybe some apps can be different depending on where you live.

[Uliwooly]

you don't have to root nor unlock the bootloader at all

[Uliwooly]

did you read the warranty part of the thread?

[Uliwooly]

they are the same

ICS it's awesome

read the warranty part of the thread