change android version to any number

Do you want to change the Android Version in setting -> about phone ( build number and android version ) ?
This is it ! The very easy trick to change it !
Phone must be rooted.
- instal Root Explore, it will ask for superuser permiston grant it. go to the System/ build.prop using root explorer
( Don't forget to make a copy of '  build.prop '..)
- touch longer of  build.prop, and choose the ' open in text editor '
( Don't forget to change " mount R/O " into " mount R/W left side it should display r/w ")
-Change it into the version and build number that you want.
Save it and restart the phone done..