Startup Idea : Mobile contact transfer

Feeling lucky that I am living in an era of mobile phones evolution. More and more people are upgrading to smartphones from basic phones. It becomes part of their (and mine as well) life. Thanks to the current economy system which allows user to buy smartphones like grocery. But transferring contacts from old phone to new phone is big challenge. SIM card has limitation of transferring around 200 single no. entry. Desktop app has limitation of different operating system of old and new phone. So here is an opportunity to serve the world with mobile app which makes contact transferring easy from different OS. Currently there are hardly any app available which can help transfer contacts for all OS. So I feel opportunity is huge as market is so big and virgin. ?I wanted to make a mobile app which help user to “switch” his/her Phone book contacts from one mobile platform to another platform seamlessly. ?I want to name this app as Switch ?Features: ? Unlimited contacts transfer from & to IOS / Android / Blackberry / Nokia / Windows ? Transfer multiple nos. in single entry ? Local contacts back up on micro SD card ? Calendar entries transfer ? Schedule Backup