Unofficial archive. This is a read-only, community-run archive of the Apple Support Community. It is not affiliated with or endorsed by Apple Inc.
musafir16
User level: Level 1 (4 points)

What does 18 refer to on iPhone X?

i phone x 18

Posted on Oct 7, 2026 7:36 PM

2 replies

Servant of Cats
User level: Level 9 (55,707 points)

Oct 7, 2026 8:03 PM in response to Limnos

Limnos wrote:
Where exactly are you seeing this? One possibility is it is referring to the system version, of which 18 is the highest that will run on your iPhone model.


The iPhone X is not compatible with anything later than iOS 16.*. The phones for which iOS 18 is the "end of the line" are the iPhone XR, XS, and XS Max.

Limnos
User level: Level 10 (462,771 points)

Oct 7, 2026 7:51 PM in response to musafir16

Where exactly are you seeing this? One possibility is it is referring to the system version, of which 18 is the highest that will run on your iPhone model.

Originally posted at discussions.apple.com/thread/256372240