Cannot fetch Galaxy Watch 4 Classic Firmware

[techyminati]

Describe the bug

• The tool cannot fetch Galaxy Watch 4 fw

To Reproduce Steps to reproduce the behavior:

1. Go to device model Set it to- SM-R890
2. Click on Check Updates
3. Update is found, click on download, it doesnt work and throws error 408, when I give correct serial number it throws error 400
4. See error

Expected behavior Firmware should be downloaded

Screenshots

Desktop (please complete the following information):

• OS: Windows 11 Home
• Browser: Chrome
• Version 1.17.5

Additional context Nothing much

[zacharee]

Samsung doesn't serve full firmware for watches.

[techyminati]

@zacharee it does, I'm getting a 1.7GB OTA from Watch 4 Manager

[zacharee]

The OTA system is completely separate from the system Bifrost uses, and hasn't been successfully reverse engineered yet.

[techyminati]

Ah okay, anything we can expect or not?

[zacharee]

Probably not. The system is very complex and seems to depend on generating unique keys based on the secure element in the device to register it.

[techyminati]

@zacharee I managed to grab ota link via packet capture, but it says it requires a key value pair

[techyminati]

@zacharee what could be case where link says "Access Denied"?

[techyminati]

URL

here