How to Enable Developer mode on Android Phone ?

1. Open Settings> About> Software Information> More.
2. Then tap “Build number” seven times(in Samsung mobiles tap three times) to enable Developer options. …
3. Go back to Settings menu and now you’ll be able to see “Developer options” there. Tap it and turn on USB Debugging from the menu on the next screen.

Features of Developer Options

The “Developer Options” feature is indispensable to Android developers, hackers and enthusiasts as a means to quickly access and control their device from the PC. Even if you are an average user and wish to root, install a ROM or mod on your Android device, you must turn on USB Debugging mode on your phone or tablet. And you’ll not be able to do it unless you enable Developer Options on your device first.

Among the most useful features that are  found under Developer Options are as follows:

• Enable debugging over USB.
• Quickly capture bug reports onto the device.
• Show CPU usage on screen.
• Draw debugging information on screen such as layout bounds, updates on GPU views and hardware layers, and other information.
• Many other options to simulate app stresses or enable debugging options.The “Developer Options” has always been visible by default in all previous versions of Android. OnDeveloper Options on Gingerbread (Android 2.3):

  Settings> Applications> Development> USB Debugging

  Developer Options on ICS (Android 4.0):

  Settings> Developer Options> USB Debugging

  Developer Options on JB (Android 4.1):

  Settings> Developer Options> USB Debugging

  If you have recently upgraded your device to Android 4.2 Jelly Bean or have bought a new device with 4.2 or higher pre-installed, do not be surprised if you find the  ”Developer Options” missing.

Enable Developer Options In Android 6.0 Marshmallow

1. Pull down on the notifications shade and open the Settings app. You can also achieve the same thing from the app drawer if you so wish.

2. Scroll all the way down and tap on ‘About phone.’

3. Now scroll down again and you’ll see an entry labelled ‘Build number.’ Keep on tapping till you see a prompt that says ‘You are now a developer!’