•Messaging Settings to set the notification for each account type (along with other preferences, for email).
Voicemail
When you have a new voicemail, 
appears at the top of your screen. Drag down the status bar and touch the notification.
If you need to change your voicemail number, in the home screen touch Menu 
> Settings > Call
settings > Voicemail settings.
Social networking
my life, your life
Your social networking account
You can set up a social network account that integrates and syncs all your social networking accounts. No opening and closing apps and menus.
Add accounts
You can add your more accounts to your social networking account. If you don’t have accounts on these sites, visit their websites to set them up.
Find it: 
> 
My Accounts > Add account
Add an account by touching it. Then enter your user name and password for that account.
When you sign into social networking accounts, you’ll see your friends and contacts in your Contacts list, and your status and updates can appear in your Social Networking and Social Status widgets on your home screen.
22Social networking