The iPhone X is not supported by iOS 17, 18, or 26. It is stuck on iOS 16 , which may stop receiving security patches soon, posing a security risk.
Refurbished iPhone X models typically sell for around $100–$130 in 2026. att buy iphone x
Certified Pre-Owned devices via AT&T undergo inspection, but older units may show signs of wear and have degraded battery health. Critical Considerations for 2026 The iPhone X is not supported by iOS 17, 18, or 26