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If you get the Android 4.2.* version phone, you will notice that there is no Developer mode any more.

How can you switch to development mode?

marked as duplicate by eldarerathis Aug 14 '13 at 15:21

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Open Settings, go to phone details (where u can see kernel, Android-version, Model number etc).

Tap 7 times the Build Number (ALPS.JB2.MP.V1.3 in my case)

If you already in developer mode, the tooltip with message: "No need, you are already a developer." will appear.

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