upgrade iphone 4 to latest iOS as 9 or 10 Is it possible to upgrade iPhone 4 iOS to 9 or 10 using jail break approach?

Main purpose to install apps which require latest iOS. So is there any method even through security bypass?

Rather throwing the older phone any possibility by experimenting?
If you check the iOS Support Matrix, you will see that the latest version of iOS that supports the iPhone 4 is iOS 7.

You can't upgrade to a version of iOS greater than that - so iOS 8, 9, 10, 11, or the upcoming 12, are all out of reach for that phone.