Samsung s4 is a best phone for all S serice. S4 in 2 gb ram and 16 gb rom. But this phone battery life is not very good but good mantain life of battery. And s4 screen resoultion 1080& 1920 in hd quality. S4 cemra is very good 13megapical back cemra and front 5mp. And big resion is s4 three model mini, 19500, 19505 but 19505 is better for other model because this model in 4G LTE.SAMSUNG S4 PRICE is very good price.