Try These Fixes
If you do see an issue with iOS 9.1 or you want to prepare for potential iOS 9.1 issues, you'll want to take a look at our list of fixes for iOS 9 problems.
Our list includes fixes for battery drain issues, lag, Wi-Fi, Bluetooth, and more. It's a great starting point for those of you that need assistance.
If you don't find what you're looking for there, the next place to look is Apple's discussion forums. There are a ton of iPhone 4s users on there so don't be afraid to ask a question if you can't find a fix.
This article may contain affiliate links. Click here for more details.