Back to Original ROM from 2.20 to 2.13 - NVID does not work

[lightman3dd]

Hello, i've read a lot..but a cannot find a clear way to go back to my original ROM (i need to repair my baby jamin but i need my original italian rom).
I've go a G3, and i've installed the ASERG rom releases. (so i've just used NVID)
Now I've try to downgrade to the original IMATE Italian rom but there's no way.

during ROm upgrade after 1% (white screen on the jamin):

"
ERROR[326]: INVALID COMMAND
THIS NBF file cannot be used fot your PDA pHONE PLease check you NBF file"

Any Idea?

I've see http://wiki.xda-developers.com/index.php?pagename=Prophet_CID_Unlock ...and i've got PDAMobiz.com_ProphetAKU2_unlockCID.rar ...but I cannot understand why i've upgrade without any problems using NVID from 2.13 to 2.20 but i cannot go back...and i want to be sure that using PDAMobiz.com_ProphetAKU2_unlockCID.rar i'll solve my issue

[lo0m]

Hello, i've read a lot..but a cannot find a clear way to go back to my original ROM (i need to repair my baby jamin but i need my original italian rom).
I've go a G3, and i've installed the ASERG rom releases. (so i've just used NVID)
Now I've try to downgrade to the original IMATE Italian rom but there's no way.

during ROm upgrade after 1% (white screen on the jamin):

"
ERROR[326]: INVALID COMMAND
THIS NBF file cannot be used fot your PDA pHONE PLease check you NBF file"

Any Idea?

Once you've had an AKU2.2 or higher on your device, you won't be able to go back to your original (AKU2.1*) ROM, unless you CID-unlock your device. You have a G3, so you're lucky you can!

But to save yourself all the trouble, I recommend you just use a stable AKU2.2/2.3 ROM.

grtz

EDIT: The RUU (ROM Update Utility) of your original ROM checks CID (security) on installation.
Because you already used AKU2.2 or higher it will fail CID-check and stop it's setup.

[lightman3dd]

Once you've had an AKU2.2 or higher on your device, you won't be able to go back to your original (AKU2.1*) ROM, unless you CID-unlock your device. You have a G3, so you're lucky you can!

But to save yourself all the trouble, I recommend you just use a stable AKU2.2/2.3 ROM.

grtz

Thanks a lot, but i need to repair my device , so i need to install the original rom otherwise no gurantee...
When my baby will go back, for sure i'll reinstall Aserg AKU3

EDIT: Just CID_UNLOCKED and the downgrade works like a rocks...My baby can go to the doctor ;-)

[fadimck]

i will try it today and tell you the result

but can you tell me where can i find the CID Unlock

i will use the same step used for the KJAM

[divxmaniak]

i will try it today and tell you the result

but can you tell me where can i find the CID Unlock

i will use the same step used for the KJAM

You could try here
http://files.pdamobiz.com/c/PDAMobiz.com_ProphetAKU2_unlockCID.rar

[horani]

You can use this way I did it many times

To return to JAMin original rom :

1- Extract your JAMin original rom ( JAMin_Arabic_213923_2139126_022021_ship )or ( JAMin_WWE_213923_2139123_022021_ship )
on your Disk top you will get two folders ( OutputFile & RUU_TOOLS ).
2- Move (nk.nbf) from ( OutputFile ) to ( RUU_TOOLS \ Prophet \ WWE ) folder.
3- Now you have the all needed files on one folder (EnterBootloader&README & ROMUpdateUtility & RUUGetInfo & RUUResource.dll)
4- You need Prophet_G4_RadioRom ( Prophet_G4_RadioRom_v2.47.21) or ( Prophet_G3_G4_RadioRom_v2.61.21 ).
4- Chang the (ROMUpdateUtility) with ( ROMUpdateUtility_No_VenderID ).
5- put your JAMin on bootloader screen the ( coloured screen ).
6- Run the ( ROMUpdateUtility_No_VenderID ) it will start update the rom. It will hang on 95%.
7- Rest it to get the bootloader screen ( coloured screen ).
8- Run the Prophet_G4_RadioRom ( Prophet_G4_RadioRom_v2.47.21) or ( Prophet_G3_G4_RadioRom_v2.61.21 ) it will up date the rome you will get 100% . Your JAMin will work again and you will get it back with i-mate rom but the SPL will not ccange it will still as it is ( SPL 2.2xxxxx001).
9- Any time you can return to te original rom you must follow this way untel some one can unlockcid or there is anew update from i-mate.

I try this way three times tody and it is working very good.

[tommytao]

if my 818pro is G4, is it impossible to get back to 2.1* ? >.<

[tommytao]

if my 818pro is G4, is it impossible to get back to 2.1* ??? >.<

[ts3010]

use what in this topic and you can do what you want I myself downgrade my rom from 2.20 to 2.09 and my Qtek is working great

http://forum.xda-developers.com/showthread.php?t=300356