How to enable developer option in android phone

1. Open Settings> About on your Android phone or tablet.
2. If you have a Samsung Galaxy S4, Note 8.0, Tab 3  or any other Galaxy device with Android 4.2, open Settings> More tab> About and tap it.
3. If you have Galaxy Note 3 or any Galaxy device with Android 4.3, go to Galaxy Note 3 from Settings> General> About and tap the Build version 7 times.
4. Now scroll to Build number and tap it 7  times.
5. After tapping the Build Number 7 times, you will see a message “You are now a developer!” If you have a Galaxy S4 or any other Samsung Galaxy device with Android 4.2, the message reads as follows- “Developer mode has been enabled