Hello can someone give me advice to how I can reboot or hard reset becuase I have been getting a black screen. I am not able to access the phone becuase it appears to either be frozen or not allowing me to access it. I cannot make phone calls, accept calls, etc. It happen once before where the screen was frozen while in middle of on an app and it did not work until the battery was completely dead and I recharged it. The battery appears to be hardset and there is NO way to remove it to hard reboot and I was wondering what should I do.