design pattern to use utility app connecting to internet

This may be a generic question but still i need suggestion/guidance on which design pattern or architecture to follow for developing this app.

The app is for premium users(for iPhone) on airport and will be able to access the internet at higher speed and on multiple devices simultaneously. I'm planning to go for Singleton,Factory,MVC patterns and client-server architecture for the app. What-all things do i need to re-think and then design the app or are above patterns sufficient to go ahead ?

thanks