Is it possible to downgrade iOS 12 to iOS 11.3 on my iphone 6s+

[iMore Question]

I want to downgrade my iPhone 6s+ from iOS 12 to iOS 11.3 but when try to reset using the ipsw file on itunes, it is rejecting it. Can anyone help me with that.

 

[Tartarus]

Nobody can help you with this.
Apple stops signing older versions but the latest after a while.

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