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Dallas SmetterFlag for United States of America

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Upgrade iphone 6s plus from 9.3.2 to 9.3.3

I have the 9.3.3. ipsw but am unsure of how to use it to upgrade my phone. Thank you in advance!
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John
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You can upgrade over the air (Wi-Fi) but I vastly prefer using iTunes for this. That is how I do it and it verifies the download before even trying to apply.

But Apple does not permit interim-only upgrades. Stay where you are, OR, upgrade to IOS 10.0.1. That is what I am using. No issues.
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Eoin OSullivan
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@jackieman - you make a valid point and I did mention that iTunes does need to validate the IPSW before you can install it.  

I wasn't clear enough that the validation will only work for certain versions as Apple choose not to validate older IPSW files after a certain time to encourage all users to update to latest versions.
@eoinosullivan

Agreed. So, Upgrade iphone 6s plus from 9.3.2 to 9.3.3 using .ipsw file via iTunes is not possible.

I did many experiments with my iPad 3 for interim update of the iOS and it failed.