Some Samsung Galaxy phones are losing Wi-Fi connections, mobile data access, or SIM functionality following the One UI 9 update.
Complaints posted on Samsung Community forums and Reddit describe intermittent disconnections and phones unable to access cellular networks. Android Authority reported the problems on November 5, with additional coverage emerging November 6. Samsung has not confirmed a common cause or announced a permanent fix.
The failures could interrupt calls, messaging, and internet access. With One UI 9 reaching more devices, affected owners face uncertainty over whether the problems stem from the software, network settings, or individual hardware.
Wi-Fi, mobile data, and SIM problems reported across Galaxy models
The complaints span Galaxy S-series, Z Fold, and A-series devices, according to Android Authority’s November 5 report. However, the number of affected phones remains unknown.
Samsung’s One UI 9 rollout across Galaxy devices is continuing in phases, with availability varying by model and market. Receiving the update does not necessarily mean a phone will develop connectivity problems.
Wi-Fi instability is among the complaints documented in Samsung Community discussions and summarized in Android Authority’s November 5 report. Users describe connections that work initially before dropping, while one Galaxy S24 Ultra owner reported difficulty connecting to 5 GHz Wi-Fi despite 2.4 GHz working normally.
Cellular failures have also surfaced. One Galaxy owner said apps stopped loading over mobile data, leaving Wi-Fi as the only working connection. Restarting the phone, toggling Airplane mode, and resetting network settings did not restore service.
A Galaxy A56 owner reported on Reddit that the phone lost cellular service after updating. Although the SIM Manager became inaccessible, the phone continued displaying carrier names. Other commenters reported similar symptoms, including one Galaxy A36 owner whose problem predated One UI 9.
These accounts have not established whether the failures share a software defect or have separate causes.
Samsung’s response and possible troubleshooting steps
No universal fix has been confirmed. Restarting phones or toggling Airplane mode has temporarily restored connectivity for some users, but the problems can return.
In a Samsung Community support discussion, a moderator recommended testing Safe Mode, contacting the carrier, and considering a factory reset only after other troubleshooting fails. Owners can also try:
- Wi-Fi: Forget and reconnect to the affected network, then test another available network.
- Mobile data: Disable Wi-Fi, check cellular connectivity, and confirm that mobile network settings are correct.
- SIM functionality: Check SIM recognition and run available device diagnostics.
Owners can submit an error report through Samsung Members. Samsung recommends sending reports within five minutes of a failure while keeping the app open during log collection.
Supported newer Galaxy foldables also provide warranty details and repair support in Settings, although availability varies by device and region.
Some users report that factory resets have failed to restore connectivity. Back up important data before considering that step.
Samsung began expanding One UI 9 on September 16, with availability varying by device and market. Android software support and update schedules also vary by manufacturer, model, and carrier. Until Samsung confirms a cause or releases a targeted fix, affected owners should document recurring failures and monitor official support channels.
Read more: Check TechRepublic’s Android 17 update tracker for rollout status and eligibility across Samsung, Pixel, OnePlus, and other Android devices.