This is how to enable Developer options on Android Mobile and others

1. Open mobile "Setting" app
2. goto "about phone"
3. findout the "OS version" or "miui/samsung/noto/theme/device version"
4. Tap in few times than shows a mesasge "developer option enabled" and sometimes need to enter password, which is your phone password or security screen password.
5. goto additional or advanced etc features section and you will found "Developer options"
6. open it and you will able to use huge of hidden android features and more.
7. If you want to stop developer options than simply tap of the top button than it's stop.
8. Without any purposes don't enable any of features and ofcourse not the developer options. It can make your security weak.