People usually changes email addresses and mobile number. Before changing numbers, they will have given that number to many. After changing, when they try, the number will not be correct and hence the call will not be connected. Many contacts are lost in a similar way. The project aims to solve this problem by maintaining an online contact base. Every contact on the mobile or on the desktop is synced with it. So If Frederik changes his mobile number, every contact who syncs to this database will receive an updated contact information. With this application in place there is no hassle when mobile numbers, emails or address details are changed.