Hello friends.I am Anil Solanki.today I am talking about phone Oppo R831K.this phone is so worst phone.means bakwas.Lenovo Vibe k5 is the best Android phone.this have many future.rear cemra 13 mega pixel.frunt 5 megapixel.32 gb internal memory.expendable memory 128gb.4 gb ram.downloading speed are so good.duelcore operating system.3000 mah batry.on stand by.600 hrs batry pickup.duel sim mobile.so friends.you purchase not Oppo R831k.purchase radmi note 4