How to silence a received callA: Press the volume key when the phone is ringing. The call will be silenced without rejection.
How to open the camera in locked modeA: Just hold the camera key for few moments. The app will start even if the phone is locked.
How to get a scientific calculator on Nokia LumiaWhen you are using the normal calculator, rotate the phone to landscape mode and you'll enable the scientific calculator.
How to add additional keyboard layouts for different languagesGo to Settings > Keyboard > Typing settings > Press to change. In the following window remove the tick from "Correct misspelt words".
How to access "to do" or "shopping list" on Nokia Lumia 800No need to install additional apps. Just open Office and go to "notes". Start a new note by pressing "+". Label it and pin it to homescreen.
How to extend battery life on Nokia LumiaGo to Settings and play with "find my phone" options. This will extend battery life.
How to fix internet issues on Nokia Lumia 800If you experience internet connecting issues via mobile data you need to download Nokia's network setup application from marketplace.
The phone does not restartConnect Nokia Lumia to the PC via USB. It will start faster