Yes, Samsung Metro 350 does have Hindi language option.
Yes, you can use memory card up to 16GB with this phone.
Yes, Samsung Metro 350 does have call recording option.
Samsung Metro 350 comes in 3 different colors - Black, White and Emerald Blue.
Samsung Metro 350 has quite good battery backup. It comes with 1200 mAh removable battery and on a single charge it can last up to almost almost 4 days.