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My iPhone 6s Is Currently Not Turning On. The Screen Is Black And When I Plug It In Or Restart It Nothing Happens. Before This My Phone Would Show Red Battery Symbol For About 30 - 1 Hour And Would Eventually Turn Back On. I Would Like To Try To Figure Out How To Fix This Without Having To Open Up My Phone. Thanks!

You probably have a dead battery. This will require that you open the phone and replace it or have someone do it for you. This is not a software issue.