If you want to import Apple I-Phone 6 , You have to declare MRP in Indian Rupees.
The Custom Duty on the Apple I phone varies between 2% - 7%.
If you are availing CENVAT than the custom duty on Apple I-Phone 6 is 7%. Hence, if you are not availing CENVAT than the custom duty on Apple I-Phone 6 is 2 %.