They could still make it sell like hotcakes with just one change (not even in price) in their T&C. Just allow this phone to use JioPhone recharge plans (for full payment ones at least) like say,
Rs75/28 days for UL calls + 100MB/day -- attractive for old people. (Use WiFi in home)
Rs125/28 days for UL calls + 0.5GB/day -- useful for secondary connection / number.
Rs155/28 days for UL calls + 1GB/day -- Bang for the buck data plan.
Rs185/28 days for UL calls + 2GB/day -- Best HotSpot tethering plan.
But Jio will never do this, as this will kill their ARPU.