How to Fix Android Wi-Fi Hotspot Authentication Problem?
An Android hotspot can appear in the Wi-Fi list yet keep rejecting the connection with Authentication problem, Check password and try again, or Couldn’t authenticate connection.
The password can be correct and still be refused. The connecting device may remember an earlier hotspot setup, or it may not support the security mode your phone is using. Neither problem is fixed by changing mobile data or DNS settings.
| What appears on screen | What needs attention |
|---|---|
| The connecting device rejects the password. | Saved Wi-Fi details and hotspot security: Methods 1-4. |
| The hotspot disappears or switches itself off. | Hotspot availability: Method 5. |
| The phone itself says Authentication failed while enabling hotspot. | Mobile service and carrier approval: Method 6. |
| Connected, no internet | Wi-Fi connected successfully. Check the phone’s internet connection in Method 6. |
| Obtaining IP address or Failed to obtain IP address | Address assignment, not password authentication. See Android IP-address troubleshooting. |
1. Restart the Hotspot and the Connecting Device
A hotspot that worked earlier can stop accepting connections. Restarting both devices clears the current connection attempt without removing saved networks.
- Turn Mobile Hotspot off on the sharing phone. The image locates the switch; it should be off for the restart.
- Restart the sharing phone and the device trying to connect.
Restarting both sides clears a stuck hotspot broadcast or stale Wi-Fi connection attempt before deeper changes. - Enable the hotspot again and reconnect nearby using the password currently displayed in its settings.
Try another device if available. If it connects, check the first device’s saved network and compatibility rather than resetting the sharing phone.
2. Forget the Saved Hotspot and Reconnect
A saved hotspot can retain the old password after you change phones or edit its settings. Forgetting that network makes the device ask for the current details again.
Open hotspot settings on the sharing phone using the instructions for your brand:
Google Pixel
Settings > Network & internet > Hotspot & tethering > Wi-Fi hotspot. See Google’s hotspot controls.
Samsung Galaxy
Settings > Connections > Mobile Hotspot and Tethering > Mobile Hotspot. Tap the network information or Configure to edit it; the layout varies by One UI version.
On other Android phones, search Settings for Hotspot; names and available controls vary.
- Check the password, or replace it with a unique password of at least 12 characters. A new network name distinguishes this hotspot from an older saved one. Changing either disconnects existing users.
Forgetting the old hotspot profile removes stale security details that can keep causing authentication failures. - On the connecting device, open Wi-Fi settings, select the saved hotspot or its gear icon, and tap Forget or Forget network.
- Select the hotspot again and enter its current password, matching capitals and avoiding extra spaces. On a compatible phone, the hotspot’s QR code is another way to enter those details.
If the password is still rejected, check security below. For a Windows-only failure, see Windows network-security-key troubleshooting.
3. Check Security and Band Compatibility
Older devices can reject a WPA3 hotspot even with the right password. Samsung recommends testing WPA2 when a device cannot connect.
- On the sharing phone, open Security in hotspot settings. Select WPA2-Personal if available, then save. Choose the WPA2-only option below the highlighted WPA2/WPA3 option in this illustration, not None.
WPA2-Personal is the safest compatibility mode when a device rejects a hotspot even with the correct password. - Restart the hotspot, forget its saved network on the connecting device, and reconnect. Test this change before changing the band.
- If it still fails, or the hotspot is missing from the Wi-Fi list, select 2.4 GHz under Band or AP band, then reconnect nearby.
Older and low-power devices often authenticate more reliably on 2.4 GHz than on 5 GHz or 6 GHz hotspot bands.
Some Pixels use Extend compatibility instead of a band menu; enable it when its description specifies 2.4 GHz. Samsung’s hotspot configuration guide covers its band controls.
If WPA2 works, keep it for that older device; WPA3 offers stronger security where supported. Never choose None, an open hotspot or WEP. Restore the previous settings if neither test helps. Band incompatibility can affect discovery, not just connection.
4. Check Hotspot Visibility and Device Restrictions
A device cannot join if the hotspot is full or its address is blocked. These controls vary by phone; there is nothing to change when they are not offered.
Open the hotspot’s connected-device list or additional configuration settings.
| Setting | Action |
|---|---|
| Hidden network or Hide my device | Turn it off if the hotspot is absent from the Wi-Fi list. This changes visibility, not password protection or blocked-device rules. |
| Connection limit reached | Disconnect an unused device and retry. Increasing the limit is not necessary for a one-device test. |
| Blocked devices or Allowed devices only | Unblock or approve only the device you intend to connect. Keep the restriction for other devices. |
5. Keep the Hotspot Available During Connection
A hotspot that turns itself off cannot finish connecting a device. These checks address that interruption, not a password repeatedly refused by a hotspot that stays on.
- Search the sharing phone’s Settings for Data Saver and turn it off during testing. Google requires this for Pixel Wi-Fi tethering.
- Check the hotspot’s Timeout or Turn off hotspot automatically setting. Allow enough time to connect; temporarily extend the timeout or disable automatic shutoff.
Data Saver, power saving, and short hotspot timeout settings can interrupt the connection before authentication completes. - If a power-saving mode is switching the hotspot off, pause that mode and reconnect.
If the hotspot still switches off, record the timeout and power settings for support. Restore changes that made no difference.
6. Check Mobile Data and Carrier Hotspot Access
Authentication failed on the sharing phone, before any device joins, can mean its carrier has not approved tethering. Changing a laptop’s saved password cannot correct that approval.
- To test mobile service, disconnect the sharing phone from Wi-Fi, enable Mobile data, and open a webpage. On a dual-SIM phone, check which SIM is selected for data.
- Confirm that your plan permits hotspot use and has data remaining, especially after a SIM, eSIM or plan change.
- If you edited Access Point Names (APNs), ask the carrier for the correct values or its approved reset procedure. Record custom settings; do not copy another carrier’s example from a screenshot.
A host-side authentication failed message often points to mobile data, SIM, APN, or carrier tethering restrictions.
A brief test with your own VPN disconnected can help with activation. Restore it and Wi-Fi afterward; leave managed VPNs to your administrator. If mobile data works but hotspot still fails, ask the carrier to refresh its hotspot service on your line.
7. Match the Address on an Allowed-Device List
Android can present a private, randomized MAC address rather than the hardware address on your allowed-device list. The two addresses identify the same device differently.
- On the connecting Android device, open the hotspot’s Wi-Fi details and find MAC address type or Privacy.
Device MAC can help when a trusted hotspot allows or blocks devices by hardware address. - Prefer approving its current randomized address on your own hotspot. Google’s MAC-address instructions explain where to find it.
- Only if your private hotspot requires the hardware address, select Phone MAC or Use device MAC, approve that address on the hotspot, and reconnect.
The illustration shows the randomized default. If the device still fails, restore that default. Leave it enabled when there is no address-based restriction.
8. Reset Wi-Fi Settings on the Device That Cannot Join
When other devices connect but one Android phone or tablet still refuses, a Wi-Fi reset clears its saved networks. It is broader than forgetting one hotspot, so check for an available software update before doing it.
Before a network reset: Have Wi-Fi passwords ready; Bluetooth accessories need pairing again. Record custom carrier APNs before an older combined reset.
Do not select Factory data reset or Erase downloaded SIMs. A network reset does not erase apps or photos.
- On Pixel, open Settings > System > Reset options > Reset Bluetooth & Wi-Fi. Google’s Wi-Fi troubleshooting instructions cover this reset.
- On Samsung, the alternative is Settings > General management > Reset > Reset Wi-Fi and Bluetooth settings. Select that option, not the mobile-network option also highlighted below.
Resetting Wi-Fi removes corrupted saved profiles that keep rejecting the hotspot password. - Read the confirmation, perform the reset, and reconnect to the hotspot with its current password. Older phones may offer a combined Reset network settings option instead.
If this device still fails while others connect, report that comparison to its manufacturer. A reset cannot add support for an incompatible security mode.
9. Install Available System Updates
Repeated failures after a software update may need a later manufacturer fix. Updating can address Wi-Fi bugs, but it is not a guaranteed cure for this message.
- Check the sharing phone’s Software update or System update menu. On Samsung, this is Settings > Software update > Download and install.
A new hotspot name and updated system software remove old compatibility and saved-profile conflicts. - Install available stable updates and restart. Check the connecting Android device too, if applicable.
- Recheck the hotspot’s password, security and band after updating, then retry. You do not need another new network name if you already changed it.
If the error still appears, record the software version for support. Do not install the old version pictured, a beta or a downgrade.
10. Consider a Network Reset on the Sharing Phone
If several devices cannot join this hotspot but can join others, the sharing phone may need attention. A reset is a late option, not a substitute for carrier approval.
- Record the hotspot details and review the reset warning above.
- Open System > Reset options on Pixel, or General management > Reset on Samsung. For Wi-Fi connection failures, select the Wi-Fi/Bluetooth reset. For mobile-service activation failures, use the mobile-network reset only after checking with your carrier.
- Review what will be removed. The illustration shows an older combined reset; newer phones have separate options. Samsung documents these in its selective reset instructions.
Resetting the host phone’s network settings rebuilds the mobile data and hotspot configuration from scratch. - Confirm the appropriate reset without erasing any eSIM, restart, and check the hotspot settings before reconnecting.
If the hotspot still fails, contact the carrier for activation errors or the phone manufacturer for Wi-Fi failures. Provide both models, software versions, exact message, security and band, and whether another device connects. Keep passwords out of screenshots.
