downgrade xperia x10 to android 2.2/2.1.........

 

if you want to downgrade

download the flashtool and firmwares from here flashtool

X10i Generic

Global GGL Generic 1232-9897 build 3.0.1.G.0.75 (MD5: 0fa325992ac4186a5499e79e57f9d2b9)

Generic version 2.3.3 build 3.0.1.G.0.75 (MD5: 36F52BAA3556CDD7E56383614C01E5D6)

Install Unofficial Port of AOKP Jelly Bean Preview custom ROM on Samsung Galaxy S2 I9100

 

Rushabh25, an XDA Senior Member, managed to create an unofficial AOKP preview port for the Samsung Galaxy S2 I9100 and you can use the instructions listed in this article to learn how to successfully install this new custom ROM. 

Read the entire article and if you have any questions then you should tell us in comments and we will get back to you

How to Downgrade Xperia Arc S to Official Gingerbread 2.3 OS

1. First get the files required.
2. You must download the Flash tool (download link here) and the Xperia Arc S firmware package (download link here) and place the same to the computer.
3. Install flash tool and extract the firmware archive (you should get the .ftf file).