Samsung Galaxy note 4 retail

Product Name: Samsung Galaxy note 4 retail
A white galaxy note 4 It is a sprint phone and I do not know how to unlock it. It's in good condition with small scuffs on the sides but no scratches. The phone works perfectly but the battery has a hard time keeping a charge. It can last maybe a few hours of no use on 100% The pen still works well with it. Comes retail with a charger. I've had this phone forever and I'm just trying to get rid of it whether someone wants to use it or take it apart for it's parts.