Nov Update Keeps Removing Custom DNS Setting?!

[Recon0xe]

Updated to latest November 2025 BYK3 and it removed my custom DNS settings and was set to Automatic.

Reinstated Custom DNS, the next day I am seeing ADs all over the place again, checks DNS setting and it's switched back to Automatic and my Custom DNS removed again.

Anyone else with this issue?

S25U

[Tourbillon De La Vie]

https://eu.community.samsung.com/t5/galaxy-s23-series/private-dns-november-update/td-p/13670422?

[Recon0xe]

Thanks

[bradleymcooper]

Yep, I have the same issue, I hope this is not a new feature?.

[smeders]

Thank god I'm not the only one. Thought my phone was the issue! S23U but on the October update

[Elliottsix]

Happening here since update. Galaxy S25 Ultra. Any type of restarts wipes dns url and sets back to Automatic

[Sotos35]

I have the same issue from the last update on my S25 ultra

[Recon0xe]

I thought it was on device restart, but I think it's just resetting every night without device restart on my device, I can usually tell because on a device restart, a few other things reset like esim update and energy wireless alarms etc, I check those and they haven't reset but the DNS has.

[DragonWolf5589]

Same problem and I'm getting sick to death with it! (does it every time i walk about at work when it changed to different hotspots at work or switches to data then WiFi and I need it at work for the security apps so don't have to do my passwords and 2fa every 5 minutes)

[Members_JwCaLgr]

Happens randomly on my S25 Ultra during the day ( no reboot ).