Update: After today's (17-07-2015) update my Lumia 1520 is showing 4G in mobile+SIM settings
My Lumia 1520 Screenshot
Thank you Microsoft for the update.
As far as I know (from various internet sources) Nokia Lumia 1520 RM-937 is a global model with 4G LTE enabled.
This very model is launched in India as the Country Variant.
But if we check here
http://www.microsoft.com/en-in/mobile/phone/lumia1520/#ProductSpecsEnhancedWidget there is no mentioning of 4G LTE anywhere.
I had read many post here stating that due to unavaiability of 2300 band in India is holding back Microsoft to enable 4G LTE for likes of Lumia 1520 & Lumia 930 here.
Then why phones like Lumia 625 is showing as 4G LTE in India website. They too don't support 2300 band.
Something is fishy with Lumia 1520 RM-937 in India
Microsoft/Nokia kindly provide an insight into this matter.
If new phones are introduced with 4G LTE out-of-the-box, kindly enable 4G LTE for Lumia 1520 in India.
Looking forward to hearing from you.