Samsung TV Apple TV app sign-in fails: 'Something went wrong

Hi. I have been unable to play my Apple TV app on my Samsung 43" UHD for about a week. It works on all other devices. I have done half a day of troubleshooting and still no success. If anyone has any experience of this problem, I'd like to hear about it!

Here's my troubleshooting log.

TV Model: Samsung UE43**7100KXXU

Firmware: T-KSU2EDDEUC-1301.0

Issue: Apple TV app loads to Home screen, but pressing Sign In always returns “Something went wrong”.

Occurs on multiple networks.

Network-Level Troubleshooting

• Tested on home Wi-Fi (strong signal, ~150 Mbps).
• Tested with DNS changed to Google (8.8.8.8) and Cloudflare (1.1.1.1).
• Tested on iPhone personal hotspot — identical failure.
• Restarted router and confirmed no filtering or parental controls active.
• Confirmed other apps (Netflix etc.) work normally.

Apple ID / Account Troubleshooting

• Removed TV and other devices from Apple ID device list.
• Waited for Stolen Device Protection security delay to expire.
• Confirmed Apple ID devices list loads normally.
• Tested Apple TV login on other Apple devices — all working.
• Apple ID sign-in works on every device except the Samsung TV.

Samsung TV App / Smart Hub Troubleshooting

• Deleted and reinstalled Apple TV app multiple times.
• Performed several hard reboots (holding Power for 5–10 seconds).
• Power-cycled TV at wall (unplugged for 60 seconds).
• Performed Smart Hub Reset.
• Attempted to access Smart Hub region reset (not available on this firmware).
• Disabled autorun settings via Start Screen Options.
• Tried all Apple TV app sign-in methods (QR code never appears).

TV-Level Troubleshooting

• Performed a full Factory Reset of the TV.
• Completed fresh setup (Wi-Fi + Samsung account).
• Installed Apple TV app before any others.
• Re-tested on both Wi-Fi and iPhone hotspot after factory reset — identical failure.
• Confirmed No firmware updates available — TV stuck on 1301.0.

Observed Behaviour

• Apple TV app launches with long spinner (~1 minute).
• Home screen loads normally (content thumbnails appear).
• Pressing Sign In immediately returns: “Something went wrong.”
• No QR code or password prompt ever appears.
• Behaviour unchanged across all networks and after full reset.

Conclusion Based on Troubleshooting

• Issue is not network-related (fails on multiple networks).
• Issue is not Apple ID-related (other devices sign in; device list normal).
• Issue is not app-cache or Smart Hub related (factory reset + reinstalls did not resolve it).