How to Fix WiFi Not Working on a Samsung Galaxy Tablet: Band Selection, MAC Randomization, Private DNS, and Android Network Reset Fixes

Samsung Galaxy tablets—including the Tab S9, Tab S8, Tab A9, and Tab A8—run One UI on top of Android, which adds network configuration layers that standard Android troubleshooting guides miss. The three most common causes of WiFi failure are MAC randomization conflicts with home routers, a misconfigured Private DNS setting that silently blocks all traffic, and band-steering issues where the tablet locks onto a weak 5 GHz signal it cannot sustain. Working through these fixes in order avoids an unnecessary factory reset in the large majority of cases. Run a speed test after each step to confirm your connection is restored before moving on.

Step 1: Restart the Tablet and Router

Power off the Galaxy tablet completely by pressing and holding the power button (or the power and volume-down buttons together on newer models) and tapping Power off. Unplug your router from the wall and wait 30 seconds, then plug it back in. Wait for the router to fully reconnect to your ISP—solid status lights, usually 60 to 90 seconds—before turning the tablet back on. A fresh boot on both ends clears stale DHCP leases and dropped authentication sessions that accumulate in memory.

Once the tablet is back on, open the notification shade and toggle Airplane mode on for 15 seconds, then off. This forces the WiFi adapter to drop its current association and renegotiate from scratch without another full restart. It resolves the “connected but nothing loads” symptom about half the time and takes under a minute.

Step 2: Forget the Network and Reconnect

Corrupted stored credentials cause repeated authentication failures that survive restarts. Go to Settings → Connections → Wi-Fi, then tap the gear icon (⚙) next to your network name and choose Forget. Once forgotten, tap the network name from the list, enter your WiFi password carefully (passwords are case-sensitive), and reconnect. This forces a clean session negotiation and picks up any changes your router made to its DHCP or security settings since the tablet last successfully connected.

Step 3: Disable MAC Randomization

This is the single most overlooked cause of WiFi problems on Samsung Galaxy tablets. One UI assigns a randomized MAC address to each network by default—a privacy feature that prevents tracking on public hotspots. On home networks, however, this confuses routers that use MAC-based DHCP reservations, device access lists, or parental controls. The router sees what looks like a brand-new, unknown device on every connection and may refuse to issue an IP address or apply the wrong network policy, leaving the tablet in an authenticated-but-non-functional state.

To disable it for your home network: go to Settings → Connections → Wi-Fi, tap the gear icon next to your home network, then tap MAC address type. Change it from Randomized MAC to Phone MAC (labeled Device MAC on older One UI builds). The tablet will reconnect using its real hardware MAC address. This change only affects the specific network you apply it to, so your privacy on public hotspots is unaffected.

Step 4: Switch to the 2.4 GHz Band

If your router broadcasts a single combined SSID for both 2.4 GHz and 5 GHz (band steering), your tablet may be holding onto a 5 GHz connection that is too weak at its current location to carry actual traffic. The 5 GHz band delivers faster speeds but has shorter range and worse penetration through walls than 2.4 GHz. Our 2.4 GHz vs 5 GHz vs 6 GHz guide covers the tradeoffs in full detail.

Log into your router’s admin page and temporarily split the bands into two separate network names—for example, “HomeNet_2G” and “HomeNet_5G”. Connect your Galaxy tablet to the 2.4 GHz network and test. If connectivity improves, the root cause is signal strength rather than software. Adding a mesh node or WiFi extender in the room where you use the tablet is the permanent fix.

Step 5: Disable or Fix Private DNS

One UI includes a system-wide Private DNS setting that many users enable and then forget about. If this is configured with a hostname that has become unreachable—a decommissioned DNS service, a corporate filter, or a mistyped entry—it silently breaks all DNS resolution on the tablet. The WiFi icon shows full bars, but no pages load and no apps connect to the internet. This is one of the easiest issues to misdiagnose as a router or ISP problem.

Go to Settings → Connections → More connection settings → Private DNS. If it is set to a custom hostname, switch it to Off and test immediately. If connectivity returns, you can leave it off, switch to Automatic to use your ISP’s default DNS, or enter a reliable public DNS hostname: dns.google for Google Public DNS or 1dot1dot1dot1.cloudflare-dns.com for Cloudflare’s 1.1.1.1 resolver. Both are free and significantly faster than most ISP resolvers.

Step 6: Install One UI Software Updates

Samsung ships WiFi driver fixes and Android security patches in monthly One UI updates. A known bug introduced in One UI 6.0 caused frequent WiFi disconnections on multiple Galaxy Tab S and Tab A models; it was resolved in a subsequent patch release. Go to Settings → Software update → Download and install and apply any pending update. If the WiFi problem itself is preventing the download, connect the tablet to a PC or Mac with a USB-C cable and use the Samsung Smart Switch desktop application to install the update over USB.

Step 7: Reset Network Settings

Resetting network settings clears all saved WiFi passwords, Bluetooth pairings, and mobile data configurations from the tablet without deleting any apps, photos, or personal data. Navigate to Settings → General management → Reset → Reset network settings, tap Reset settings, and confirm. After the reset, rejoin your WiFi network by entering the password again, and reconfigure any VPN apps or intentional Private DNS settings you use.

This step resolves most persistent software-level WiFi failures that survive the earlier fixes, including corrupted DHCP state and network stack misconfiguration that accumulates across multiple One UI upgrades. While you’re reconnecting and reviewing your network, our WPA2 vs WPA3 security guide explains which router encryption standard you should be running in 2026.

If Nothing Works: Safe Mode and Factory Reset

Boot into Safe Mode by holding the power button, long-pressing Power off until the Safe Mode prompt appears, then tapping Safe Mode. Test WiFi. If it connects in Safe Mode but not normally, a third-party app is blocking the connection—common culprits include VPN apps, network scanner tools, and aggressive battery-saving apps that kill background services. Uninstall recently installed apps one at a time in normal mode to identify the offender.

If WiFi still fails in Safe Mode, a factory reset is the final software option. Back up your data to Samsung Cloud or Google Drive, then go to Settings → General management → Reset → Factory data reset and confirm. Set up the tablet as new rather than restoring from a backup—a backup restoration can reintroduce the same corrupted network configuration files. Test WiFi before restoring any data. If the tablet cannot connect to any network even after a factory reset, the WiFi antenna or radio chip is likely physically damaged; contact Samsung Support or visit a Samsung Service Center for a hardware diagnostic.