Steps to Enable Developer Mode:

1. Go to phone settings
2. Scroll to the bottom and find for a tab called "About Phone", click it
3. Scroll through the list until you find a heading called "Build number".
4. Tap on the "Build number" 7 times (after the first 2 taps, a notification should appear below that says __ steps till developer mode
5. Go back to the main settings page, the tab called "Developer options should appear above the "About phone" tab.

Steps to Disable Developer Mode:

1. Go to phone settings
2. Scroll until you find a tab called "Apps", click on it.
3. Scroll until you find the app called "Settings"
4. Click on the button that says "Clear data", when prompted a confirmation, tap on "OK".
5. Now the Developer Options should disappear from the phone settings page