IMPORTANT OF GOOGLE ACCOUNT IN ANDROID PHONES

Sync your mail, contacts, calendar, and more Sync your Google services to your phone, tablet, and desktop programs so that you can always access what's important to you. Gmail See and use your Gmail using a mobile device, desktop programs like Outlook and Thunderbird, or even while you’re offline. Contacts Integrate your Google contacts with those on your mobile device, or learn how to import and export contacts from different email accounts. And its very easy to import back your phonebook contacks when ever u bought a new phone by adding ur gmail accout under phone settings.