Sprint customers interested in LGs G Flex, rejoice. The carrier now offers pre-orders for the curved, flexible handset, with sales beginning on Jan. 31. Sprint priced the handset at $299 with a two-year contract. Sprint Easy Paycustomers can grab the phone for $149 down plus 23 payments of $20.84, plus a final payment of $20.68. Sprint says the G Flex will run on the carriers new Spark enhanced LTE network.