FOR ICE CREAM SANDWICH AND PREVIOUS VERSIONS
Developer options are mainly for developers but users who want more than just available may use these option and get more out of their phones.Also if you need to connect your phone to PC and install all of its drivers automatically you need to check DEBUGGING option in developer options.It’s also needed if you want to manually upgrade or downgrade your phone’s firmware or if you want to root your phone.
In ice cream sandwich version of android it’s pretty easy to find developer’s options
go to Options–>Setting–> and their you will find developers option which is second last option in the list.Go to the developer options and check USB DEBUGGING box.
Jellybean is the latest version of android till date.Users may not find developers option easily as in the previous versions.Here is a method of enabling developers options in android jellybean. Go to setting–>About Phone–>build number
Now when you see this build number TAP on the build number for 7 times.While you are tapping you will see after 3 taps a prompt message will appear saying that there are 4 more taps to go.
After tapping 7 times you can now go back to settings menu and there you will seedevelopers option.