No. And you won't get important security & vulnerability updates, which would just be stupid.
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BS. Runs fast at doing what? Your 4s is a 32-bit device running simplistic and very insecure and out of date software. It's a product of its time.
Your iPhone 7 will murder any previous device at any task.
No reason to be rude. I should have qualified my statement. I meant in the general function of the device, not whether it benchmarks as fast or can run a modern game.
Turning the 4s on, opening apps, the fluidity of the UI, and using apps and games that were made for its time is basically just as fast as doing the same functions on the 7. Of course the 7 will kill the 4s in any modern game/app and browsing the web is a lot slower on the 4s than the 7.
All I meant to illustrate is that if you don’t update an iPhone to an iOS version that will slow it down, the phone will continue to run just and fast as smooth as it did new. My 4s runs iOS just as fast as it did the day it was first installed and using iOS 6 on the 4s doesn’t feel any slower than using iOS 11 on my iPhone 7.
Of course this is not to mean that a 4s is technically equal to a 7.