Help How to downgrade from 2.3.2 beta to original 2.2.1

[margol1]

A few weeks ago, I upgraded my brand new Galaxy S from the original 2.2.1 to 2.3.2 beta. Assumingly, this caused disappearance of the mobile AP function. Since it is crucially important to me, I'd like to go back to the original firmware. Clear, I can't do it with Kies. Is there any other reliable way to do it ? Are there step-by-step instructions ? Thanks.

 

[kavimani]

A few weeks ago, I upgraded my brand new Galaxy S from the original 2.2.1 to 2.3.2 beta. Assumingly, this caused disappearance of the mobile AP function. Since it is crucially important to me, I'd like to go back to the original firmware. Clear, I can't do it with Kies. Is there any other reliable way to do it ? Are there step-by-step instructions ? Thanks.

Hey there... you need to first flash XXJPU ( base version of 2.2.1) and then you can flash XXJPY which is the stable version of 2.2.1.. the process of flashing remains the same, you can find both the firmwares on Samfirmware.com
This process is tedious but that is the only way you can go back to stable 2.2.1.. Have done it hence I know..

 

[margol1]

Thanks, but apparently I found more straightforward way. See here:
Update Samsung Galaxy S GT I9000 to stable Froyo XWJS7 2.2.1 | Android Advices
I got XXJPY in one flash only. Seems working, although I had to reinstall some applications despite they were backed up. Anyway, its only minor inconvenience.