[Guide] Downgrade from 4.3 or 4.4 for root / Restore imei

ZeroXXoreZ · Jan 6, 2014

CM11 is up for togari

Hope it's ok to post the link, if not mod please remove;

https://sites.google.com/site/projectfreexperia/download/cyanogen-mod-11

I won't have time to flash it before I go to work but will try first thing tonite. Hope this solves the IMEI issue!

ps000000 · Jan 7, 2014

I can flash many CM10x base rom without mobile signal problem
(by downgrade to 532/257 b4 flash)

But with 2 of unofficial CM11 I lose my mobile signal or
I doing something wrong ?

blueether · Jan 7, 2014

ps000000 said:
I can flash many CM10x base rom without mobile signal problem
(by downgrade to 532/257 b4 flash)

But with 2 of unofficial CM11 I lose my mobile signal or
I doing something wrong ?

I think both cm11 builds need a .290 base for the Sony firmware

ZeroXXoreZ · Jan 7, 2014

blueether said:
I think both cm11 builds need a .290 base for the Sony firmware

Hooray! It's working

But now I've lost root access again...

stretchwookie · Jan 16, 2014

i would like to confirm that download option 3 worked perfectly for me. there are a couple difference between bigxie's situation and mine. But i assumed since the principles were the same that id should work anyway

i was on pac rom 4.3, not cm10

i only had 1 zero for imei, not 14-15.

i hope this helps others that think it may not work for them.

blueether · Jan 21, 2014

New easy method in OP

Downgrade path 1 (easy):

Charge phone

Download latest version of flashtool (link below)

Download needed files

Download a suitable Sony firmware for your model from the ftf thread [see below] - .532 or .526 should work

Download a suitable Sony firmware for your model from the ftf thread [see below] - Needs to be .257

It may pay to come from a stock .290 so download that as well

Flashing

Flash .290 all defaults if not coming from stock - just to be safe

Flash .257 Untick Cache, Data and Apslog in the top [BOX]; Exclude system in the second [BOX];

Flash .526 Leave Cache, Data and Apslog ticked] in the top [BOX]; Exclude everything except kernel and system in the second [BOX];

Reboot

blueether · Jan 24, 2014

Updated again with @[NUT]'s flashable ftf so it is a one step downgrade process now

78triton · Jan 30, 2014

Cant flash and roms other than stock

I lost my imei number so i used flashtool and flashed.290 then rooted and install recovery again but now i can flash any roms i keep getting an error
assert failed: Getprop ( "ro.product.device") = = "c6806" then a few more like that with different models at the ened then says e:erroe executing updater binary in zip '/sdcard what can i do to flash pacman rom or cos. IT will only flash stock roms

blueether · Jan 31, 2014

78triton said:
I lost my imei number so i used flashtool and flashed.290 then rooted and install recovery again but now i can flash any roms i keep getting an error
assert failed: Getprop ( "ro.product.device") = = "c6806" then a few more like that with different models at the ened then says e:erroe executing updater binary in zip '/sdcard what can i do to flash pacman rom or cos. IT will only flash stock roms

if you are flashing any of the custom roms (pac/CM/etc) the easiest way is to start with a .290 base the flash the boot.ing that is in the zipfile for the ROM either with flashtool or fastboot

Open archive with 7zip etc
only extract boot.img
copy boot.img to flashtool_dir/firmware/ (passably changing the name to reflect the rom it is from if you are likely to try many)
boot phone into fastboot mode (volume up while connecting to PC)
use flashtool (or quickimg) to flash boot.img via fastboot>select kernel to flash

boloksbongas · Jan 31, 2014

blueether said:
if you are flashing any of the custom roms (pac/CM/etc) the easiest way is to start with a .290 base the flash the boot.ing that is in the zipfile for the ROM either with flashtool or fastboot

Open archive with 7zip etc

only extract boot.img

copy boot.img to flashtool_dir/firmware/ (passably changing the name to reflect the rom it is from if you are likely to try many)

boot phone into fastboot mode (volume up while connecting to PC)

use flashtool (or quickimg) to flash boot.img via fastboot>select kernel to flash

Thanks will try this. Lost mine too not too long ago.

78triton · Jan 31, 2014

blueether said:
if you are flashing any of the custom roms (pac/CM/etc) the easiest way is to start with a .290 base the flash the boot.ing that is in the zipfile for the ROM either with flashtool or fastboot

Open archive with 7zip etc

only extract boot.img

copy boot.img to flashtool_dir/firmware/ (passably changing the name to reflect the rom it is from if you are likely to try many)

boot phone into fastboot mode (volume up while connecting to PC)

use flashtool (or quickimg) to flash boot.img via fastboot>select kernel to flash

That seems like the hard way to do it is the no way to just flash the zip. Its weird i can flash 4.4 roms but not 4.3 unless they are stock roms
doesnt that seem odd

NiCk.JaY · Feb 15, 2014

Never mind, got it

r351574nc3 · Mar 14, 2014

Can't get to Flashmode

I've been trying to use flashtool to flash the 290 ftf, but I can't. All I can do is flash the system.sin and userdata.sin in fastboot mode. I can't get to flashmode. When I plugin my usb cord and hold the Volume Down button, the LED just flashes from green to red and then turns off. The Flashtool acts like it got into flashmode, but then halts. It never gets passed 0%. It looks like I can't get into flashmode. I've tried everything. Any ideas?

blueether · Mar 14, 2014

Yes the LED out in flash mode.
Can you post the output from flashtool when trying yo flash the ftf. Have you tried another ftf?

Sent from my Xperia Z Ultra using Tapatalk

alberto888zz · Mar 25, 2014

Reb0rn said:
When I tried the first solution it did not work.

The second solution worked for me. However, I did wipe data or else cm10.2 won't boot.

1. Be on 290 with UL bootoader.
2. Flash boot.img from cm10.2
3. Enter recovery and factory reset.
4. flash cm10.2 and gapps.
5. Boot in to cm10.2 and ignore initial setup process. Just skip skip skip.
6. When in home screen, open phone and dial *#06#. If you see IMEI lots of zeros, your OK.
7. Now turn off phone and ftf .257 but exclude system and kernel. Uncheck wipe data.
8. Profit.

Still 0s IMEI after this guide and cm10.2-togari

blueether · Mar 25, 2014

Did you try the [NUT] way in the OP?

Does the IMEI return when on a stock 4.3 or 4.4 sony firmware?

alberto888zz · Mar 25, 2014

blueether said:
Did you try the [NUT] way in the OP?

Does the IMEI return when on a stock 4.3 or 4.4 sony firmware?

[NUT] not yet! It 's the second very long post?

Yes with 4.3 or 4.4.2 stock i have IMEI, and also with cm11-nightly!

blueether · Mar 26, 2014

alberto888zz said:
[NUT] not yet! It 's the second very long post?

Yes with 4.3 or 4.4.2 stock i have IMEI, and also with cm11-nightly!

[NUT] made the FTF that is in Downgrade path 1 in the first post

Downgrade path 1 (very easy):
Download needed files
Download C6833_14.1.B.1.532_NUT.ftf
Flashing using flashtool
Flash EVERYTHING in the above ftf by @[NUT]
Reboot

Flash EVERYTHING in this ftf, (use the defaults) it will do the downgrade below so you will end up on .532 with a working IMEI ready to root with bin4ry's tool
http://xdaforums.com/devd...ct/dl/?id=3442
You will end up with a device that thinks it is a C6833 but when you flash 4.3 or newer (.290 or .136) just use the one for your real model and the model number will be restored.

It is quick and simple then just flash the newest 4.2 FTF if you want to use CM 10.2. If you are happy with CM 11 just stay as you are

alberto888zz · Mar 26, 2014

blueether said:
[NUT] made the FTF that is in Downgrade path 1 in the first post

It is quick and simple then just flash the newest 4.2 FTF if you want to use CM 10.2. If you are happy with CM 11 just stay as you are

I have flashed back 4.4.2 stock, then C6833_14.1.B.1.532_NUT.ftf and now IMEI it's ok also with cm10.2

Thanks! :victory:

Justin^Tan · Mar 26, 2014

i downgrade using NUT ftf. and i'm in .532 now. i want to root using binary but i cant seem to root it
what method should i pick?

[Guide] Downgrade from 4.3 or 4.4 for root / Restore imei

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