Film Name: How to Power Switch Off Nokia Lumia Windows Phone 8 Windows Phone 8.1 when its Hanged Freeze Screen | Tech Master. br (This is a video on how to Power Switch Off Nokia Lumia 720 when its Hanged). br Directed & Edited by: Jagdish Didwana. br Tech Master: Vinod Didwana. br br For more such videos and updates Stay Tuned and like Tech Master Official page: www.facebook.comtechmastertvshow br Subscribe our channel: www.youtube.comtechmastertvshow br Blog: br br Tech Master - A Technology Show By Didwana Films.