Buy Best Smartphones Under 40,000 Rs, maybe even a premium flagship now going for less. Samsung should definitely have some smartphones in the list of the top 10 mobiles under Rs 40,000, and the same goes for other tier-1 brands like Sony, HTC and LG too.. provided they’re in stock. Choosing the best phone to buy under Rs 40,000 may not be easy, but after you find some worthy options in our list, you can use the “Compare” tool to match the specs and see what they bring to the table. That way, you can make an informed decision. The list of best mobile phones to buy under Rs 40,000 this month is as below.