Samsung Galaxy S24 Ultra Wi-Fi Not Working: Network Fixes & Diagnostics

② FixUpPhone Expert Analysis

Troubleshooting based on Samsung’s published specifications, service terms and coverage, plus FixUpPhone’s service information.

Step 1 — Isolate first: this phone, this network, or every network?

Two tests, before any reset. First, the control: another device on the same Wi-Fi — if it also fails, the fault is the network, the line or your provider, not this phone. Second, this phone on a different network: works there, the fault stays at home; fails there too, it follows the phone. Note the symptom — no networks listed, won’t join, joins with no internet, drops, or slow — and when it began. If calls are the symptom and your plan supports Wi-Fi calling, test with it off: calls failing only over Wi-Fi is another network-side datapoint.

Step 2 — Restart the router properly, the radios, and the phone

Do the router before any phone reset, properly: power off, wait a full 30 seconds, power on, let it boot completely — a half-booted router imitates several phone faults. With separate router and broadband boxes, restart both, broadband unit first. If other devices are still offline afterwards, the line is the fault — call the provider. On the phone, turn Airplane Mode on for a full 30 seconds, then off, so every radio reconnects from scratch; then restart the phone. “Connected” but nothing loading usually means the router lost its internet connection while still broadcasting a name.

Step 3 — Forget the network and rejoin

Forget the problem network in Wi-Fi settings, then rejoin it. Have the password ready first — forgetting deletes it. This clears the network’s saved profile, a classic cause of join failures and connect-and-drop loops.

The randomised-MAC and filtering fork

For privacy, the phone presents a randomised MAC address to each network by default. A router running MAC filtering reads that as a stranger: the phone joins, is rejected, and asks for the password again — a loop that looks exactly like a wrong password. If your network filters by MAC, add the phone’s address for that network to the router’s allowed list, or set this network to use the device MAC.

Step 4 — VPNs, profiles, and Safe Mode

A VPN app reroutes traffic through its own tunnel, and a broken tunnel looks exactly like broken Wi-Fi while the connection is healthy; a work or school profile can do the same. Restart into Safe Mode — third-party apps disabled — and test. If Wi-Fi behaves there, or pages load once such an app is fully off rather than paused, Wi-Fi was never the fault; the fix lives in that app or profile.

Step 5 — Router firmware, bands, and the distance check

Check the router’s app or admin page for a firmware update; stale firmware quietly causes drops and failed joins. Then rule out a band question before blaming hardware. This phone is tri-band Wi-Fi 7 — 2.4, 5 and 6 GHz — so a network name that never appears here but shows on other devices is a router or region question, not a phone limit: bands may be named separately, band steering may push this phone to a band it handles badly, the 6 GHz radio may be off, or 6 GHz may not be permitted where it is used. Test another band: 2.4 GHz reaches furthest through walls; 5 and especially 6 GHz are faster but shorter-ranged — struggling only on 6 GHz at distance is physics, not a fault. Test in the problem room, then beside the router: flawless beside it, weak two rooms away is reach, not damage — and run one test with the case off, since a thick case can weaken signal.

Step 6 — Update the software

Install any pending system update and test again — wireless fixes ship inside updates, and a fault that began right after one is a software suspect first. An update cannot fix a failed router, a changed password, or internal damage. Also check adaptive switching: a phone can leave Wi-Fi on purpose, switching to mobile data whenever Wi-Fi looks weak, which imitates drops. Turn it off for a day and see whether the “drops” stop.

Step 7 — Reset network settings, near the end, with its honest cost

Only when everything above has failed, reset network settings. Know the cost first: every saved Wi-Fi network and password is erased, and Bluetooth pairings are wiped — note passwords, and expect to re-pair earbuds, watches and the car. It deletes no photos, apps, messages or accounts; it is not a factory reset. It is the dividing line: failure on multiple networks after a clean reset rules out settings and software — what remains is hardware. Cellular data can keep you online meanwhile, but it is a separate system with its own ladder if it fails.

Hardware signs — when it really is the phone

The genuine signs are specific. One: Wi-Fi unavailable or greyed out, or no networks visible anywhere while other devices see them — especially after a drop or liquid. Two: Wi-Fi and Bluetooth 5.3 both dead after the same incident — the two radios share wireless circuitry and antenna paths, so a paired failure points at shared hardware, while Bluetooth working narrows the fault. Three: connection only at very short range, a pattern consistent with antenna damage. Four: drops when the phone flexes or warms up. Then the calendar: on sale 31 January 2024, launch buyers passed the 1-year warranty around 31 January 2025, but the warranty runs from your own purchase date — a later buyer may still be in term, and a no-damage failure inside that year is a defect to raise with Samsung first. Accidental and liquid damage are never warranty-covered; active Care+ may change the maths. Back up before any repair.