In this video, I’m fixing the classic “Amazon Prime Video not working on iPhone” problem with quick, no-jargon steps. If Prime Video won’t load, keeps buffering, or acts weird on your iPhone (or iPad), I start with the fastest reset: sign out and sign back in. Open Prime Video, tap your profile picture, go to Settings > My Account, hit Sign Out, then log back in and test again. If that doesn’t do it, I move to device-level and account-level fixes that actually matter. I show you how to check Prime Video’s Registered Devices and deregister anything unnecessary (too many devices can cause headaches). Then I go for the clean reinstall: long-press the app, Remove App > Delete App, reinstall from the App Store, and log in fresh. I also call out the big blockers—sketchy internet, an expired Amazon Prime membership, and VPNs (Prime Video can detect VPNs and block playback, plus some titles are region-restricted). Finally, I recommend updating the Prime Video app from the App Store, because outdated versions can cause streaming issues.