Hey guys My SIS gave me her BLU 5.0, she said if i can fix it i can keep it so what i did was examine the phone carefully i noticed that on the battery it said built in battery she told me that so i looked at it carefully nothing happened i looked over the back and found this gold button i took a sharp pencil and pressed it then i powered it on and it worked it said BLU bold like us and stuff like that. I hope this answer helped you very much.