Mobile Phone Book App

I need a phone book or phone service app for mobile smart phones. The specifications are as set out below -it shall be colorful -numbers can be set out in categories ,which are 1 Emergency numbers 2 family or friends 3 services number 4 products numbers 5 international numbers I also need the ability for the users to 1 add their own numbers 2 categories 3 search by name or category 4 if you are in a category to be able to search numbers as well I also need the ability for the app to look online for updates of new numbers or replacing some of the old numbers -will update the numbers myself (for such things as products or services or emergency numbers) Ability to connect to Facebook , LinkedIn , Myspace , twitter and other social networking platforms and ask friends or family to download the app as well. Ability to call or send messages or store email address directly from the app And any ideas to enhance the app It should be easy to use It should be easy to load