One of the biggest problems of Android smartphones are that you haven't big privileges in some settings (as uninstall and manage app); Sometimes this app are unnecessary, but we can't delete them, because we haven't Root permissions.
Italian version: Ottenere i permessi di Root. 

If Google Play doesn't work well, or the application you want there isn't on this market you can download it by internet; I remember you that download APK is illegal and WorldInformatic assumes no responsibility for the use of this guide.
Italian version: Installazione di file APK sul proprio Android.

For some years, the CyanogenMod is becoming more popular among Android users; it enhances and corrects the Android Operative System optimizing graphic, interfaces and functions. The CyanogenMod directly operates on the Google code and so we can define it as an alternative to Android default Operative System.
Italian version: CyanogenMod 10.1 - Guida all'installazione.