The Samsung Galaxy S4 was launched in 2013 and no doubt, its a really good phone.
Housing a 1.5 gb ram with an octacore processor, the phone comes with a 5 inch full hd Amoled display,
Android 4.3 ( upgradable to 6.0) , 8 mp rear camera with Led flash and a front 720 p front camera.
The phone is really light, weighing only around 150-160 grams.
Though many phones are available in the market presently un the price bracket of s4, but those who want to have a flagship experience, this is a viable option