If you are planning to buy Nokia Lumia 1520 from AT&T in the US, here is a great deal from Microsoft Store. If you are getting a new AT&T connection, you will get $100 bill credit. And another cool offer is that you can save 50% on the Nokia Flip Cover when you buy the Nokia Lumia 1520.
Nokia Lumia 1520 costs $99 on 2 years AT&T contract. Find the deal here from Microsoft Store.