Google has started an Android KitKat contest in India under which it is assuring to provide Nexus 7 to 1000 winners.
All you have to do is to buy a KitKat chocolate with Android logo on it. Each of these KitKat will have a special eight digit code on inside the wrapper. Then you have to SMS that code to 09880298802. To SMS, type KITKAT
You can winners list on Android KitKat page; they will also contact if you emerge as a winner. The contest was started on 27th September and will be valid till 15th November.
Google had earlier this month announced that the next version of its Android 4.3 operating system will be called Android 4.4 aka Kitkat.