Chosen Solution
Okay so yeah. I installed a replacement battery from iFixit a few months ago. All was going great. I recently discovered I had to update to iOS9 to use an app needed for work. Well, I tried that, and now the phone is bricked. Or so it would seem after reading the link below, which perfectly mirrors what happened to me. I guess my main question is, how is this not more of a thing? No warnings seen on either side? I am now stuck having to dish out for a new phone whenI was just fine where I was. Lesson learned, I guess. http://www.iphonehacks.com/2016/02/ios-9…
Have you tried restoring to iOS 9.3 through iTunes? I have no idea why this error would be affecting you as this is supposed to only be an issue for iPhones with touch ID sensors, which the 4S does not. Are you getting error 53 or something else? This is the apple response to error 53 I found: https://support.apple.com/en-us/HT205628
