You Might Not Want to Install It Right Now
The iOS 9 update and its features are tempting but there are some reasons why you might want to avoid the upgrade, at least for right now.
If you need your iPhone 4s for work or school in the near future, you might want to think about waiting until after the big presentation. The last thing you want is for a critical application or document to cause you problems. You also should avoid the iOS 9 update if you're traveling.
The iPhone 4s iOS 9 update isn't going anywhere. Take your time.
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