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This post has been copied from www.ultranaija.com so, KUDOS goes to the Blog!

According to Apple, "iOS 9 brings you refinements at every level — from the apps you see on your Home screen down to the foundation of the system. Siri is smarter than ever, proactive suggestions keep you on track, and multitasking on iPad hits an all-new high with Slide Over, Split View, and Picture in Picture. All these enhancements enable your devices — and you — to do so much more every day".

Note: You don't need to be an iPhone 6s user before you can get the new iOS 9.

iOS 9 Top Features

-- Siri's Improvement
-- Battery Life
-- Hide Pictures
-- Unknown Caller Suggestions
-- App Predictions
-- Easy To Update

All updates are available to download wirelessly on your apple device the moment they’re released. Your device even alerts you when it’s time to get the latest version. So you won’t miss out on all the amazing features and security enhancements in new updates.

First of all, make sure you're connected to the internet, before following the steps below

-- Settings
-- General
-- Software Update (after clicking software update, wait for the device to check for available update)
-- Download & Install

You're good to go!

Alternatively,
-- You can connect your device to your laptop
-- Launch iTunes
-- And iTunes will automatically detect your device, and notify you about the iOS 9 update
-- Click on 'Download and Update', and you're good to go!

Very nice