If your phone doesn't want to boot up again after the update, it gets stuck in a black screen, follow this tutorial where we root the Galaxy SII with Odin and put an official Samsung Android 4 ICS on it.
This is a very welcome feature that saved my day at various occasions, you can turn your iPhone into a wireless hotspot and share its mobile data connection.
With time it can happen you have a bunch of installed apps on your Windows Phone 8 powered phone you never use anymore, I suggest you to remove them to free some of the storage.
Sochi is a city in Krasnodar Krai, Russia. This winter Sochi will be in the center of the action, becouse it will host the biggest winter event on the world, Winter Olympic Games.