@Dipan
I don't think there are good indian warranty CDMA handset which will fulfill all your listed requirement in 5-6K.
Since you already know the drill for importing a handset, would suggest Samsung Galaxy Axiom OR Samsung Stellar, preference being for axiom for better camera/NFC. Both has 1.2Ghz Dual Core Qualcomm Krait processor, 1GB RAM, 4" Display, android jelly bean & massive 2100 mAh battery. Both also works on OMH SIM with data so no MEID registration should be necessary. Don't think there is any other phone with specs similar/better to axiom you can get at below cost. Total cost including customs+shipping should be around Rs 7,000 for Axiom. iShop international is giving total quote of Rs 7,195 with item cost Rs 5,604, international shipping Rs 425 & Duty/Taxes/Fees Rs 1,166. May end up even cheaper on Shop&ship as ishop duty/taxes are high.
Mint/excellent condition Axiom for US $ 89 on Ebay.com >> http://www.ebay.com/itm/MINT-Samsung-Galaxy-Axiom-SCH-R830-Silver-gray-U-S-Cellular-Smartphone-/181197931017?pt=Cell_Phones&hash=item2a303d0209
Good condition Samsung Stellar are available at even lower from $ 60 onwards on ebay.com.