How to turn on developer options on Android Jelly Bean?
On the new Android Jelly Bean release 4.2, 4.2.1 and 4.2.2 and above, Google has turned off the developer options on Settings. It is probably the case that they did not want the regular consumers to access the developer options and confuse themselves by setting the wrong options. Also, certain option may constitute a security risk as it makes it much easier to install unauthorized programs. So, how do you turn on or enable the developer options if you are a developer. It turns out that Google has hidden the developer option as an Easter egg.
To turn it on, follow these steps.
1) Go to Settings by tapping the Gear like icon on your Android home screen.
2) Then go to About option in the Settings Menu
3) Depending on your device, scroll down the About menu to the Build option.
4) Then tap on the Build option 5-7 times and you will see a Toast message of the number of times left before Developer option is enabled. After your fifth or seventh time, your Developer option will be enabled and turn on.
5) Go back to the Settings menu and you should be able to see the “Developer Options” menu.
Now make sure you turn at least USB Debugging to on. When you connect your device to your desktop via a USB cable, Eclipse should now be able to recognize the device and when you choose “Run Android Application” in Eclipse, your device should show up as one of the choice for running it on. Sometimes, there may be an additional message when you first connect to the device about some private key stuff in which case you should click Okay.
This developer options is now automatically turn off in many of the newer devices with newer OS such as Samsung Galaxy S4 (GS4), Nexus 7 and Nexus 4 and all devices with Android version 4.2, 4.2.1 and 4.2.2 and above.