buy this wifi router. it can also be used as range extender. this product has just released.
Edimax 5-in-1 N300 Wi-Fi Router, Access Point, Range Extender, Wi-Fi Bridge & WISP BR-6428nS V4 http://www.amazon.in/Edimax-Router-Extender-BR-6428nS-V4/dp/B01IDQNLNA
today it is selling at 60% discount.
generally its price should be rs 1500 or above.