Be for doing any thing you have to Backup your Android Phone Data See this guide Here
2-Download
TWRP 2.8.7.0 From
Here5-Open up ODIN and click on PDA And enter
download mode*If you don't now how to enter download mode so replay at this post here with your android phone name
6-Select
Recovery.img from the attachment you downloaded
7-Make sure ONLY "AUTO REBOOT" is checked
8-Click START
10-Your android phone will be rebooted.
That's it you are successfully done