You’ve Already Restarted Everything
Let me guess. You’ve turned WiFi off and on. You’ve restarted the tablet. You’ve restarted the router. You’ve re-entered the password three times. And your old Samsung Galaxy Tab or Lenovo tablet still won’t connect, or it connects for ten minutes and drops.
Meanwhile, every phone and laptop in the house works fine.
If you have an iPad with this problem instead, the fixes are a bit different. But for Android tablets, keep reading. The cause is almost always something your router is doing that your old tablet can’t handle.
Why Your Old Tablet Lost Its WiFi
Three things have changed since your tablet was new, and any one of them can break your WiFi connection:
Your router switched to WPA3. WPA3 is the newest WiFi security standard, and routers sold since 2020 usually have it on by default. Android 10 and up support WPA3 fine. But if your tablet runs Android 8 or 9 – which most old tablets do – it might not understand the WPA3 handshake at all. Your tablet sees the network, tries to connect, and gets rejected. Sometimes it says “authentication error,” sometimes “incorrect password,” sometimes it just spins forever.
Your router moved to 5GHz only. Some newer mesh routers (like Google WiFi or Eero) aggressively steer devices toward the faster 5GHz band. Older Android tablets with cheap WiFi chips sometimes only support 2.4GHz, or they support 5GHz but struggle to maintain a stable connection on it. If your router combined both bands under one network name and started preferring 5GHz, your tablet might be trying to connect on a frequency it can barely handle.
Your router’s firmware updated. ISPs push firmware updates to routers silently. These updates sometimes change security settings, channel configurations, or band steering behavior. One day your tablet works, the next it doesn’t, and nothing in your house changed except the router’s internal settings.
The Router Fix That Solves Most Problems
Log into your router’s admin page. This is usually 192.168.1.1 or 192.168.0.1 typed into a web browser on your phone or laptop. The default password is often on a sticker on the router itself, or it’s “admin/admin” (check your router’s manual).
Change WiFi security from WPA3 to WPA2/WPA3 mixed mode. This is the single most common fix. Mixed mode lets your router accept connections from both old (WPA2) and new (WPA3) devices. The exact setting name varies by router:
- Netgear: Wireless Settings, Security Options, WPA2/WPA3
- TP-Link: Wireless, Wireless Security, WPA/WPA2-Personal
- Xfinity/Comcast: Login at 10.0.0.1, Connection, WiFi, Edit, Security Mode
- Google WiFi/Nest: Open the Google Home app, go to Wi-Fi, Settings, Advanced Networking, and turn off “Use Wi-Fi Protected Access 3.” This falls back to WPA2, which old tablets handle fine.
- Eero: Open the Eero app, go to Discover, eero Labs, and toggle off WPA3.
Make sure 2.4GHz is available. If your router has separate settings for 2.4GHz and 5GHz bands, make sure 2.4GHz is enabled. If both bands share one network name (which is common), try creating a separate 2.4GHz network name just for older devices. Something like “HomeWiFi-2G” so your tablet connects specifically to the band it handles best.
After changing these settings, go to your tablet’s WiFi settings, tap your network name, tap “Forget,” and reconnect with the password. This clears any cached connection data that might be causing problems.
“Connected, No Internet” – The Certificate Problem
This is the really frustrating one. Your tablet connects to WiFi, shows the WiFi icon, but nothing loads. The browser says the connection isn’t secure, apps say “no internet,” and you’re ready to throw it out the window.
On Android 7.1.1 and earlier, the root SSL certificates that verify website identities have expired. Your tablet’s certificate store hasn’t been updated since the last system update, which was years ago. When it tries to reach a website, the security check fails because the tablet doesn’t trust the certificate anymore.
The fix: Install a modern browser. 
Chrome and Firefox ship with their own certificate stores that stay current regardless of your Android version. If Chrome won’t install because your Android version is too old, try Firefox – it supports Android 8.0 and up. If neither works, try the apps that still install on older tablets for alternatives.
Note: This only fixes the browser. Apps that use the system certificate store will still have problems. Some apps (like YouTube and Netflix) bundle their own certificates, so they’ll work fine. Others won’t. There’s no great fix for this beyond what the app developers decide to support.
When the Tablet Keeps Disconnecting
If the tablet connects fine but drops WiFi after a few minutes or hours, the problem is usually on the tablet side.
Turn off battery optimization for WiFi. Android’s battery saver and Doze mode aggressively shut down background connections on old tablets. Go to Settings, Battery, Battery Optimization (or Adaptive Battery on some tablets), and either turn it off entirely or exclude specific apps you want to stay connected. On Samsung tablets: Settings, Device Care, Battery, Power Mode, set to “Optimized” instead of “Maximum power saving.”
Turn off WiFi power saving. Some old Android tablets have a WiFi power saving mode buried in advanced WiFi settings. Go to Settings, WiFi, tap the three dots or “Advanced,” and look for “WiFi power saving mode” or “Keep WiFi on during sleep.” Set “Keep WiFi on” to “Always.”
Check for IP conflicts. If multiple devices on your network somehow got assigned the same IP address, they’ll fight over the connection and both will disconnect intermittently. On your tablet, go to Settings, WiFi, tap your connected network, and check the IP address. If it starts with 169.254, your tablet didn’t get a proper address from the router. Reboot the router to clear the IP table.
Switch to a static DNS. Sometimes the DNS server your router assigns is slow or unreliable on old devices. On your tablet, go to WiFi settings, long-press your network, tap “Modify,” show advanced options, and change DNS to 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare). This can fix both connection drops and the “connected but pages won’t load” problem.
When It’s the Tablet’s Hardware
If you’ve tried everything and WiFi still doesn’t work, the tablet’s WiFi antenna or chip might be failing. Signs of hardware WiFi failure:
- WiFi toggle turns off by itself
- Signal strength is always one bar even next to the router
- WiFi stopped working after the tablet was dropped
- Bluetooth also doesn’t work (they often share the same chip)
At that point, the tablet’s WiFi is done. But it doesn’t have to be useless. You can still download content over USB or load it manually, or repurpose it for something that doesn’t need constant connectivity. If your tablet has broader issues beyond WiFi, our troubleshooting guide covers the full range.
If your tablet is generally running slow on top of the WiFi problems, fixing performance first sometimes resolves what seems like a connection issue. A tablet that takes 30 seconds to process a DNS request looks a lot like a tablet that can’t connect.
Quick Fix Checklist
- Log into your router and switch security from WPA3 to WPA2/WPA3 mixed mode
- Make sure 2.4GHz band is enabled
- On the tablet: forget the network and reconnect
- If “connected, no internet”: install Chrome or Firefox for updated certificates
- If WiFi drops: disable battery optimization and WiFi power saving
- If pages won’t load: change DNS to 8.8.8.8 or 1.1.1.1
- If signal is always weak: the WiFi hardware may be failing
Nine times out of ten, it’s the router’s WPA3 setting. Change that first, and you’ll probably be done before your coffee gets cold.
