For those who are still using iPhone 4S devices, the following article will answer your questions related to iOS 9.3.5 upgrade for iPhone 4s devices. From here you will be able to decide whether to upgrade iOS 9.3.5 to the iPhone 4s.
As you know, for a month now, Apple has continuously released two iOS 9.3.4 and iOS 9.3.5 upgrades to fix the security flaws that iOS version 9.3.3 with
https://Software/co-nen-nang-cap-ios-935-cho-iphone-4s-khong-5583n.aspx
However, in the case of the iPhone 4S device, it is another thing, launched a long time ago, but the name iPhone 4S has always been on the list of iOS 9.3.5 upgrades, but the devices and hardware no longer allow the device to run smoothly “like new” as well as the operations on the device, Also quite similar to iOS 9.3.4 on iPhone 4S devices, after upgrading