If you’ve just updated your Samsung Galaxy Nexus or ASUS Nexus 7 to Android 4.2 – or you just picked up a new LG Nexus 4 or Samsung Nexus 10 – then you might be wondering where your developer settings went. Previously located right above the About phone or About tablet link in the settings menu, they are now nowhere to be found.
That’s because they’re hidden, but luckily they’re very easy to get back.
Just navigate to Settings > About phone or About tablet. Find the build number at the bottom of the list (JOP40C in the case of the Nexus 7). Tap it seven times in a row, and when the settings are successfully unlocked, you’ll see this message: “You are now a developer!”
The developer options are now back where they belong. (Try to tap the build number again, and you’ll get this: “No need, you are already a developer.”)
Most likely, Google hid these as inexperienced people were probably tinkering with them, messing things up, and subsequently complaining. Now, as the Nexus line grows in popularity, there is a smaller risk that people who don’t really know what they’re doing will do that again, although they’re still easily available to those who want them. Kudos, Google.[Android Central]