Can the iPhone XS/XS Max record 4k video?
Both the iPhone XS and XS Max are capable recording 4K video at 24 fps, 30 fps, or 60 fps. The XS Max is also capable of recording 1080p HD video at 30 fps or 60 fps, and 720p HD video at 30 fps.
Special video features include optical image stabilization, 2x optical zoom, 6x digital, slo‑mo video support for 1080p at 120 fps or 240 fps, time‑lapse video with stabilization and the ability to take 8MP still photos while recording 4K video.
The iPhone XS Max is equipped with a dual 12MP wide-angle and telephoto cameras. You can see full camera specs here.