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At any time, you can check for and install software updates.
Go to Settings 
The screen shows the currently installed version of iOS and whether an update is available.
To turn off automatic updates, go to Settings > General > Software Update > Customize Automatic Updates (or Automatic Updates).
Here at ItsManual.com we collect as many owner’s manuals from around the web.
We then store these as both PDFs and as HTML that is easily viewed on pretty much every browser and device.
By doing this we can make sure that a copy of each manual we find stays online and is easily accessible for years to come.
Inside these owner’s manuals, you will typically find information on how to assemble, set up and even operate the product you have bought safely.
If you have a manual for a product that others may not have then please submit it to this site to help out.