Wi-Fi Error: Authentication Problem (Android) — What It Means & How to Fix It

What Does This Error Mean?

The 'Authentication problem' error on Android means your phone tried to join a Wi-Fi network but failed during the login process. This most often happens because the password is wrong, or because Android has saved a bad password from before. Forgetting the network and reconnecting usually solves it.

Affected Models

Android 10
Android 11
Android 12
Android 13
Android 14
Samsung Galaxy
Google Pixel
OnePlus

Common Causes

The Wi-Fi password was changed on the router but Android is still using the old saved password
The wrong password was entered when first connecting
The router's security type changed (e.g., from WPA2 to WPA3) and Android is confused
The router's MAC address filtering is blocking your Android device
Android's Wi-Fi network data has become corrupted

How to Fix It

Forget the Wi-Fi network and reconnect. Go to Settings > Wi-Fi, long-press the network name (or tap the gear icon), and choose Forget. Then tap the network again and type the password carefully.

This clears the bad saved password and gives Android a clean start.
Double-check the Wi-Fi password. Look at the sticker on your router for the default password. Passwords are case-sensitive — check for capital letters, numbers, and special characters.

The most common cause of authentication problems is simply a wrong password.
Restart both your Android phone and your router. Power both off completely, wait 30 seconds, and restart the router first, then your phone.

A fresh start on both ends clears many temporary authentication glitches.
Change the router's security type from WPA3 to WPA2 or WPA2/WPA3 mixed mode. Log into your router admin page (usually 192.168.1.1) and look for Wi-Fi security settings.

Some older Android devices struggle with WPA3-only networks. Mixed mode supports both.
Reset network settings on your Android phone. Go to Settings > General Management > Reset > Reset network settings. This clears all saved Wi-Fi passwords and Bluetooth pairings.

This is a last resort — you will need to rejoin all your Wi-Fi networks after the reset.

When to Call a Professional

Authentication problems on Android are almost never hardware issues. If none of the fixes work, try connecting to a different Wi-Fi network to confirm your phone's Wi-Fi is working. If your phone can join other networks fine, the issue is specific to that one router's settings. Contact your ISP if you cannot access the router's admin page to check security settings.

Frequently Asked Questions

Why does my Android keep showing authentication problem even though the password is correct?

If the password is definitely correct, the issue is usually the router's security type. WPA3-only networks can cause authentication failures on Android devices that primarily support WPA2. Log into your router and switch to WPA2/WPA3 mixed mode. This supports all devices without sacrificing security.

What is MAC address filtering and could it be blocking my phone?

MAC address filtering is a router security feature that allows only approved devices to connect. If the router owner enabled this, your phone needs to be added to the approved list. Log into the router admin page and either disable MAC filtering or add your phone's MAC address to the allowed list.

Does resetting network settings delete photos and apps?

No. Resetting network settings only clears Wi-Fi passwords, Bluetooth pairings, and mobile data settings. Your photos, apps, contacts, and personal data are not affected. You will need to reconnect to all Wi-Fi networks and re-pair Bluetooth devices.