How to Downgrade iOS 7.1.1 or iOS 7.1?

Basically i'm a Gn2day.com writer, i want to know about Downgrade 7.1.1 / Downgrade 7.1 to 7.0.6 on newer devices like iPhone 4, iPhone 4s, iPhone 5s, iPhone 5c and more…

http://www.gn2day.com/

It is impossible.

You can't. Apple devices can never roll back it's os. Once you upgrade it it's permanent on that device.

Even if you reset to default so it's like new with all apps deleted the last os you loaded stays.

Apple insists on controlling everything it's users can and can't do.

Am not a apple user. But i called a friend and he like all the answers said no can do