Xiaomi might be the champion of overall smartphone shipments in India, but Samsung still has the regional premium crown. Then again, the Galaxy S9 and S9+ have been eclipsed by the OnePlus 5T during Q1 2018.
This is far from officially confirmed information, but it's definitely not unreasonable to expect a 64GB OnePlus 6 configuration to fetch Rs. 36,999 in India, up from the 5T's Rs. 32,999 starting price.