Upgrade your Galaxy s2 TO (JELLY BEAN 4.1.2) versionon

1. 1st backup your all ROM to your phone external memory or in your PC.remember for backup all data you must have CWM in your phone if in your phone have no CWM then click this link ( এই লিঙ্ক থেকে)this is a ZIP file  and download.After then UNZIP this file and copy this soft file and past in your phone rute directory and instal in your phone then you can see a temporary CWM recovery menu then from here you can backup your ROM.

2.download ROM from this link ( এই লিঙ্ক) this is not a custom ROM.This is made for galaxy S2 and this is a Samsung licked official ROM.

3.now switch on your phone by download mode.For switch on your phone in download mode follow below instruction.....
**off your phone
**press > power off button+home button+volume down button then you can see a warning page
**then continue  press volume up button and enter main download mode see below image.....


 

4.extract ZIP file and then you can see a folder from here you can see another folder thats name is (ODIN3_V3.04 now on this ODIN soft and connect by download mode with USB in your pc.and you  can see a yellow port in ODIN ID:COM. see the below screen short....






5.click on PDA tab from ODIN and select file CODE_I9100XXLSJ.tar
in this same way for PHONE and CSC tab and select this two file--- MODEM_I9100XXLS6.tar and CSC_HOME_OXX_I9100OXXLS1.tar.   

6.Now check all setup after that PRESS START BUTTON and then you can see start flashing process after flash you can see a word in white box is (PASS) but remember one thing DO NOT DISCONNECT YOUR PHONE UNTIL REBOOT then you can see you GALAXY S2 IS MADE TO JELLY BEAN 4.1.2 VERSION.see below screen shoot..... 









Thanks to all