Test another device on the same network first. If both fail, check the router and internet service. If only the phone fails, restart it and rejoin the network. Save a network-settings reset for last because it removes saved connection details.
Differential
Likely causes of “Samsung Galaxy S Wi-Fi will not connect or keeps disconnecting”, and how to tell them apart
- 1
A Wi-Fi 6 or 6E router that the One UI 8 driver does not like
What separates it Full signal bars, Connected, and nothing loads on Wi-Fi 6E routers while the same network works on other devices
How to confirm In the router's settings switch Wi-Fi 6 or 6E off for a test, or set the band to 5 GHz only, and see whether the S23 holds
- 2
Intelligent Wi-Fi in the advanced options
What separates it The phone keeps trying to switch away in the background and the link stutters
How to confirm Wi-Fi, Advanced settings, Intelligent Wi-Fi: switch off the options
- 3
L4S in Connection Labs
What separates it The link works but stalls during calls or games
How to confirm In Wi-Fi settings open Connection Labs and try switching L4S on, as some S23 owners did
- 4
Wi-Fi Calling broken by an update
What separates it Calls over Wi-Fi drop or never connect even with strong Wi-Fi
How to confirm Switch Wi-Fi Calling off and on, forget the network, and check for the next patch
- 5
An old router firmware
What separates it The S23 drops while older devices do not
How to confirm Update the router firmware and compare
Before you touch a setting
Record this first — changing settings destroys the evidence
- The router make and model and whether it is Wi-Fi 6, 6E or 7
- Whether the fault began after One UI 8 and the date
- Whether Wi-Fi Calling is affected
- What happens in Safe mode
Try in this order
0 of 6 completedTest the router with Wi-Fi 6E off
ReversibleIn the router's admin page switch the 6 GHz band off, or set 5 GHz only, and rejoin from the S23.
Turn off Intelligent Wi-Fi
ReversibleWi-Fi, three dots, Advanced settings, and switch off Intelligent Wi-Fi.
Try L4S under Connection Labs
ReversibleIn Wi-Fi settings find Connection Labs and switch L4S on, which some S23 owners say settled the connection.
Restart Wi-Fi Calling
ReversibleSettings, Connections, Wi-Fi Calling off, wait a few seconds, then on.
Forget and rejoin
ReversibleTap the gear beside the network, Forget, and join again.
Reset network settings last
Reset / data riskSettings, General management, Reset, Reset network settings.
Model-specific
What is true of this model and not of its siblings
- Samsung Galaxy S23 will not connect to Wi-Fi or keeps disconnecting
- Galaxy S23 Wi-Fi faults come in two layers that are easy to confuse. The first is a connection that fails outright, which in 2025 and 2026 has been reported after One UI 8: the signal bars are full, the phone says connected, and nothing loads, even on Wi-Fi 6E routers such as the Nest Wifi Pro. The second is a call-quality fault that rides on the same link: owners found Wi-Fi Calling stopped working on the S23 after One UI 8, even with a strong Wi-Fi signal. The reported workarounds are specific: turn off Wi-Fi 6 or 6E on the router for a test, switch off Intelligent Wi-Fi in the Wi-Fi advanced options, and switch on the L4S option under Connection Labs. SamMobile also published a temporary fix for an earlier S23 disconnection problem, so this phone has a history of it.
- The S23's Wi-Fi
- Wi-Fi 6E with Bluetooth 5.3, so Wi-Fi 7 features of newer routers fall back to Wi-Fi 6E.
- What to report
- If a router model reproduces the fault, tell Samsung Members which router and band, since that helps them reproduce it.
Stop boundary
When this stops being a self-service repair
- !If the S23 fails on several routers after the steps, send a Samsung Members error report with the router models
- !If every network fails in Safe mode and after Reset network settings, book a hardware check
- !If only one router fails, update it or contact its maker
Evidence ledger
Sources behind this answer
Samsung's Wi-Fi checklist.
S23+ owners whose Wi-Fi showed full signal but carried no traffic after One UI 8.
A temporary fix for S23 Wi-Fi disconnections.
Wi-Fi Calling failing on S23 phones after One UI 8.
Per-model battery, charging, chip, display and storage for the S23, S23+ and S23 Ultra.
Exact questions
Common questions
Why does my S23 say connected but nothing loads?+
S23+ owners reported this after One UI 8, even on Wi-Fi 6E routers, and the workarounds were turning off Wi-Fi 6 or 6E on the router and turning off Intelligent Wi-Fi on the phone.
Did One UI 8 break Wi-Fi Calling on the S23?+
Owners reported Wi-Fi Calling failing after One UI 8. Toggling it, forgetting the network and installing the next patch are the steps reported.
What is L4S in Connection Labs?+
It is an experimental low-latency networking option in the Wi-Fi settings; some owners found switching it on helped.
Is this a new problem on the S23?+
SamMobile published a temporary fix for an earlier S23 Wi-Fi disconnection problem, so it has recurred.
wifi: model differences
Also covered: Samsung Galaxy S20 Ultra family.