How can I download iOS 9 to my iPhone 4 that's connected to a Cromebook?

[iMore Question]

how can i download ios9 to my iphone 4 thas connected to a cromebook?

well yeah..

 

[Rob Phillips]

Re: how can i download ios9 to my iphone 4 thas connected to a cromebook?

Welcome to iMore! iTunes isn't compatible with the operating system in your Chromebook. You'll need to download it to a computer running Windows or OS X.
You should be able to update over the air by going to Settings > General > Software Update.