I am unable to update my iPhone 6s beyond iOS 15.7.8.

Hello,

There are different ways to ensure the highest iOS that your device will support is installed on your device. When updating, your device will update to the highest version currently available that it will support, or it will just say it is up to date (and can't go any higher) and won't install anything. If you want to run a higher system version than your current device is capable of running, you need to buy a newer device.

iPhones 6S through 7, and SE(gen. 1), will only update to iOS 15.8.2

This support article has instructions about updating an iPhone or iPad wirelessly --> Update your iPhone or iPad - Apple Support Read the article for recommended criteria for being able to use wireless updating.

You can also use Mac and PC computers to update system software --> Update iOS on iPhone - Apple Support

KiltedTim wrote:

sirikonda16 wrote:

my iphone 6s is stucked in ios 15.7.8

[Re-Titled By Moderator]

That’s correct. it can’t go any further.

That's incorrect, according to Apple. ;-)

Apple security releases - Apple Support

iOS 15.8.2 and iPadOS 15.8.2

This update has no published CVE entries. iPhone 6s (all models), iPhone 7 (all models), iPhone SE (1st generation), iPad Air 2, iPad mini (4th generation), and iPod touch (7th generation) 05 Mar 2024

sirikonda16 wrote:

my iphone 6s is stucked in ios 15.7.8

[Re-Titled By Moderator]

That’s correct. it can’t go any further.