Is IOS 15.8.3 still receiving security updates?

Probably not, as Apple might not want to put resources into an outdated OS.

Well, it looks like Apple did put resources towards OS 15, sine they released iOS 15.8.4 about 2 weeks ago. Somehow, you must have missed that.

It is "up to date" as far as the capability of the iPhone model is concerned.

Or, in other words, the iPhone cannot be updated to run iOS 16, 17 or 18.

15.8.3 is the last security update that was released for iOS 15.

It was released on July 29, 2024.

Apple supports the current version and the 2 previously major versions of iOS.

iOS 15 is technically no longer supported.

It is possible that it could get a security update in the future if a major flaw is discovered, but don’t count on it.

If your company is running 15.8.3, you need to upgrade your devices to ones that are capable of running a supported version of iOS.

This is a user to user only forum and we don't work for Apple, nor have any knowledge of whether Apple will release any future security updates for devices still on iOS 15.8.3. Sorry, but no one here can answer whether iPhone 6s or 7 models will get security updates in the future.

amarot97 wrote:

I need iPhone 6s Plus 15.1.3 update barson

You cannot pick and choose a version of iOS. If you have an iPhone 6s Plus, you can update it to the latest release of iOS 15. If it is actually an iPhone 6 Plus (no "s"), you can only update it to the latest release of iOS 12.

About iOS 15 Updates - Apple Support

About iOS 12 Updates - Apple Support

Update your iPhone or iPad - Apple Support

A security update was just released for iOS 15 and I’m downloading it now, so yes it still gets security updates

My update not success

Technically no, since last year in July, but some users have reported an update over the weekend which has kept the version number at 15.8.3 but left the iPhone at the "Hello" screen, typically seen after an update.

One can only guess what the update was, as there is no info about it on Apple's security update page, but I have seen a few reports on the forums about it, so its safe to assume something was updated.

We may get some more details further in the day.

iOS 15.8.4 was released on March 31st, 2025.

About the security content of iOS 15.8.4 and iPadOS 15.8.4 - Apple Support

iOS 15.8.3 iOS is up to date

Probably not, as Apple might not want to put resources into an outdated OS.

You may want to read the entire thread before posting.

An update to iOS 15 was released 2 weeks ago.

6+ 15. V

Nope

jagsir128 wrote:

6+ 15. V

NOT possible.