May 2026, the One UI 9.0 Beta for the Galaxy S26 Ultra is causing significant Wi-Fi connectivity, data loss, and app incompatibility issues. The issue you are experiencingโInstagram working on data but not Wi-Fiโis a known symptom of this beta software, which is causing broken Wi-Fi firmware or conflicts with networking protocols
I have one problematic AP that Samsung struggles with where I need to connect to another AP first and then I can connect to the "problematic" AP but I've had that issue on 8.5 as well as older galaxy phones running various versions of OneUI I do not have any unusual behavior on OUI9
I didn't see any changes; it's the exact same as before the beta. But in general, the S26U has a weaker Wi-Fi range than other phones. Like S25U or Zfold7
