(adsbygoogle = window.adsbygoogle || []).push({}); Looking to buy a iPhone 5s on the 22nd and wondered if it has been updated to 9.3.4 can I downgrade and of so can someone quote me the link?

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After download
Go to iTunes
Restore iPhone click with shift key
Will let you install iOS..

Or am I wrong ?
If am sorry and I will delete my comment I'm new to the iPhone

It's always possible to download the iOS firmware, I could download iPhone OS 1.0 tomorrow - however since iOS 4 (I think?) they've been "signing" the firmware. This means that Apple can remotely enable or disable iOS firmwares from being installed. They usually stop signing one version within two weeks of an update being released, meaning 9.3.3 will likely stop being signed in the next few days.