Lumia 1020 Specs Query

[guri21]

Does the Lumia 1020 model I purchased i.e 909.1 supports 4G?
But in settings->mobile networks it gives only 2 options 2G or 3G ? Or is something to do with firmware. mine is RM-675 india

Check the screenshot from the box below

 

[N_LaRUE]

This should answer your question: Nokia Lumia 1020 - Full phone specifications

As to why you're not seeing 4G I'm not entirely sure. I think you got the RM number incorrect by the way.

 

[guri21]

RM number is RM-875_im_india_230
I guess it might not be enabled in the firmware then.
In India 4G is currently available on Airtel on iPhone 5S,although I'm not sure whether it has general availability.