i suggest n 6680 bcoz i have n6630 and it is not good as n6680 and the featers is not good.it also hangs frequently.
Dude ... wake up ... 6630 is one of the most stable phones ever .... and in fact it has a faster processor than the 6680 ....
Welll .... i'd say u should get the 6630 .... 6680 has a lot of features that will probably take many years to be implemented in India ..... and 6630 for some reason has a better no. of running apps. ....
And as for a 6681 ..... i'd say its really good ..... plus it also features a flash ...