Samsung best Galaxy note 4

Product Name: Samsung best Galaxy note 4
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 best of no use on 100% The pen still works well with it. Comes 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.