Sony didn't disclose the price of the "C" series variant. The new devices were showcased in the Mobile World Congress in Barcelona this year nad have nearly the same specifications.

While the Aqua M4 is the first complete water-proof smartphone in the mid-range segment, the C4 boasts of having more camera modes that the rivals.

"We are looking to reach the top in this price segment with our new releases and in the future Sony will release many more products," Mukesh Srivastava, head at product marketing (Xperia devices), said during the launch.

 

Sony Mobiles also took the covers off its 2015 flagship smartphone Xperia Z3+, which offers only a few small upgrades over last year's Xperia Z3. The model had earlier been launched in Japan as Xperia Z4, but Sony has named it Xperia Z3+ for the international release. It is available for Rs 40,790 on the official website.