[WEEKLY][ROM][MIUI][2.10.26] MIUI Jelly Bean for Samsung Galaxy S [Clean][Fast] - xda-developers
Download the 2.10.26. (Link in embedded in the word "Download")
Flash it TWICE.
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Before anything, tell me WHICH things you want to backup in your phone? Just the apps or SMS wagera bhi karne hain?
Open Titanium Backup > Preference > Troubleshoot Settings > "Follow All Symbolic Links" ... MAKE SURE this option is ON. NOW make all the backups of "USER" Apps you want. (NOT System Apps, for example Google Play etc) You can also use "Batch Backup" option.
Precracked version of Titanium Backup is HERE.
For contacts, Open contacts App > Menu > Export to Storage.
tell me if i am missing something.