To see your own number go to Settings -> more -> about device -> Status. Now scroll down and you should see your own number under the title “My phone number”.
When watching a video press and hold with your finger on the video part to bring up brightness control. You can then slide your finger up or down to modify the brightness settings.
Hold the touch button to the left of the home button (the more settings or options button) to quickly open search.
In settings you can turn on or off some switches for functionality. You know this, but you can also tap on the words of an option and it might open even more options.
To quickly call a contact swipe their name right. To quickly send a message swipe their name left. On the phone keypad page you can use the number pad that shows to type out the “name” of the person you want to call. For example if I want to call Mary I would enter 6272. As the code is typed out the phone will find the person with that name from your contacts.
My own experience as a professional smartphone reviewer,