10 Things to Know About the iPhone 4s iOS 9.2.1 Update

How to Get iOS 9.3 Right Now

If you want to try iOS 9.3 on your iPhone 4s right now, you can.

Apple's iOS 9.3 beta is available to anyone with a working iPhone 4s and Apple ID. All you need to do is sign up through the Beta Software Program. It's free and you'll be able to help Apple track down bugs and issues ahead of the public release. 

Early software isn't for everyone though and you'll want to make sure that it's right for you and your device. If you decide that it is, make sure you prepare your iPhone 4s for the upgrade.

Like the iOS 9.2.1 update, it could have unintended effects on your performance.