If you still wish to purchase an iPhone X as a backup or secondary device, use these verified refurbished platforms: Apple iPhone X 10 64GB iOS Factory Unlocked Grey ... - eBay
The iPhone X is limited to iOS 16 ; it does not support iOS 17, 18, or the current iOS 26. Legitimate 2026 BOGO & Free iPhone Offers iphone x buy 1 get 1
You can only find the iPhone X through third-party refurbished and used markets. If you still wish to purchase an iPhone
While the iPhone X is no longer part of such deals, major carriers currently offer BOGO or "free with plan" promotions for modern models: it does not support iOS 17