If I purchase a iPhone 5s now will it be able to perform smoothly with further updates?

helpplease123

Commendable
Jan 7, 2017
14
0
1,510
I've thought of buying an iPhone 5s as a low budget phone for time being ( atleast 2 years )
My only worry is it not running smoothly with further updates like iOS 11. Which update can the 5s run smoothly till? Would you reccomend buying the 5s or is there any other phone? Will the SE work with further updates smoothly? You're welcome to reccomend any phone with a price of a maximum of 270$ (18,00 INR)