I am explain you about samsung galaxy s4.this is very good phone.this isfully loaded features phone.it has 1.6 Ghz processor, it has 2gb ram, 16gb internal memory.it is oprating system is android 4.2.2.is upgreaded android 5.its 13megapixel rear and 2 megapixel front camra withled flash .camra quality is too good.this phone body is very slim and stylish body with hard.this phone is battery backup is very good .really this phone is very good.