When a smartphone, laptop, or tablet refuses to connect to a wireless network despite entering the correct password, it's one of the most frustrating experiences in modern digital life. You enter character after character, check the keyboard layout, and ensure the combination is correct, but the system returns a standard error message or remains stuck indefinitely in the "Obtaining IP Address" status.
Most often, the problem lies not in a forgotten password, but in conflicting security settings, outdated drivers, or full router memory. Encryption protocols such as WPA2-PSK And WPA3, require exact matching of parameters on both sides of the connection, and the slightest mismatch in protocol versions blocks access.
In this article, we'll take a detailed look at all the technical issues that can interfere with connection and provide actionable steps for Windows, Android, and iOS. You'll learn how to diagnose hidden errors and configure your equipment for stable operation.
Conflicts between encryption and security standards
The first and most common reason for access denial is incompatibility of encryption protocols between the router and the client device. If the router is configured to use only the latest standard WPA3, and your gadget only supports WPA2, the connection will physically fail to be established, even if the password is entered correctly.
Modern routers often use mixed mode, but sometimes the router firmware contains bugs that prevent it from correctly processing requests from older devices. In this case, manually changing the security type in the router settings can help.
You need to log into the administrator's web interface and find the section responsible for the wireless network. There, you need to change the encryption method to combined mode. WPA2/WPA3 Mixed or temporarily switch to clean WPA2-PSK (AES), which is the most versatile.
⚠️ Attention: Changing the encryption type to a weaker one (such as WEP or TKIP) will make your network vulnerable to hacking. Use WPA2 or WPA3 if your devices support them.
It's also worth paying attention to your regional settings. Some routers automatically change available channels and encryption standards when changing regions, which can result in the network becoming invisible or preventing connection for devices purchased in another country.
Problems with DHCP and obtaining an IP address
Often, a device successfully authenticates with a password but gets stuck at the IP address acquisition stage. This means the router's DHCP server is either overloaded, has exhausted its pool of available addresses, or the client itself is unable to process the response correctly.
The router's address pool may be limited to 10 connections, for example. If you have a smart home with dozens of light bulbs, cameras, and sensors, new devices may simply not receive a "digital pass" to the network.
- 📶 Check the number of active clients in the router's admin panel.
- 🔄 Try rebooting your router to clear the DHCP Lease Table.
- 🔧 Increase the range of addresses issued, for example, from
192.168.1.100to192.168.1.250.
If automatic address acquisition doesn't work, you can try manually entering a static IP address in the Wi-Fi settings on the device itself. To do this, you'll need to know the gateway address (usually 192.168.1.1 or 192.168.0.1) and subnet mask 255.255.255.0.
Date and time errors on the device
Few people realize that an incorrect date and time on a smartphone or tablet can block a Wi-Fi connection. Security protocols use timestamps to verify certificates and authorization tokens.
If the device's time is significantly different from the actual time (for example, if it reset after the battery died or the firmware was updated), the router's or provider's authentication server may consider the request invalid and reject it.
The solution is simple: go to the system settings, find the "Date & Time" section, and enable automatic synchronization via network. After adjusting the time, try connecting again.
This issue is especially relevant for older Android devices and budget tablets, where the built-in clock can lag noticeably without regular synchronization.
Full memory and router freezing
A router is also a computer with its own operating system and RAM. If left running for a long time without rebooting, errors can accumulate in its memory, and the ARP address table can become overflowing, resulting in a denial of service for new requests.
The device may simply "not see" your new connection request, ignoring it even if the password is correct. This is a classic case where "turning it off and on" actually works.
It's recommended to perform a full reboot of your router (by unplugging it for 10-15 seconds) at least once a week. This clears the cache and resets frozen processes.
⚠️ Attention: Don't confuse rebooting with resetting to factory settings. A reset will erase all your settings, including your ISP password and network name.
It's also worth checking the router's case temperature. An overheated processor can cause instability in the Wi-Fi module and disruptions in handshake connections with client devices.
Network card drivers and software failures
If the problem occurs only on one specific device (e.g., a Windows laptop), the issue is most likely with the wireless adapter drivers. Outdated or corrupted drivers may not process data packets correctly during the connection.
Open Device Manager, locate your network adapters, and check the status of your Wi-Fi module. If there's a yellow exclamation mark next to it, the driver needs to be updated or reinstalled.
Sometimes removing the device from the system and then rebooting helps. Windows will automatically detect the "new" hardware and install a fresh copy of the driver.
Commands for resetting network settings in Windows
Open a command prompt as administrator and enter: netsh winsock reset and netsh int ip reset . After running the commands, be sure to restart your computer.
On smartphones, a similar procedure is resetting network settings. This will delete all saved Wi-Fi passwords and Bluetooth settings, but it often resolves software conflicts.
Interference and frequency range issues
Modern routers operate in two ranges: 2.4 GHz And 5 GHzSometimes devices get confused if a network has the same name (SSID) for both bands and try to connect to a congested or weak signal.
The 2.4 GHz band is heavily polluted in apartment buildings. Microwaves, Bluetooth headsets, and neighbors' routers can interfere, potentially causing the password packet to be lost in the air.
Try temporarily separating the networks by giving them different names, for example Home_WiFi_2.4 And Home_WiFi_5GConnect the problematic device to a 5 GHz network, which is less susceptible to interference, or, conversely, to 2.4 GHz if the device is located far from the router.
| Parameter | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Range of action | High (up to 40-50 m) | Medium (up to 20-30 m) |
| Permeability of walls | Good | Low |
| Interference level | Tall (many neighbors) | Short |
| Maximum speed | Up to 450 Mbps | Up to 1300+ Mbps |
It's important to keep in mind that some older devices simply don't work with 5 GHz, while newer ones may "prefer" it, even if the signal there is too weak for a stable connection.
Maximum number of connected clients
Every router has a technical limit on the number of simultaneously connected devices. For budget models, this is often 10-15 clients, while for more advanced models, it can be 32, 64, or even 128.
If the limit is reached, the router stops responding to association (connection) requests from new devices. The password error message in this case is merely a generic system response and doesn't reflect the actual nature of the problem.
- 📱 Disconnect unused gadgets from Wi-Fi.
- 🖥️ Check if any of your neighbors have connected to your network.
- ⚙️ Consider purchasing a router with support for more clients or installing an access point.
Often, the limit can be increased in the router's advanced settings, but this can reduce overall network performance, as the processor will have to spend more resources to serve each client.
☑️ Connection diagnostics
Why does my phone say "Incorrect password" even though I'm entering it correctly?
Most often, this is a keyboard layout error (entering Russian letters instead of English or vice versa) or Caps Lock is enabled. It's also possible that the router password has been changed, but the device is attempting to use the saved old password. In this case, you need to "Forget the network" in the Wi-Fi settings and re-enter the password.
How do I know if my device supports WPA3?
Information about supported security protocols can be found in the device's technical specifications on the manufacturer's official website. Smartphones and laptops released after 2019 typically support WPA3. If you don't have specific information, try switching your router to WPA2/WPA3 Mixed mode.
Can antivirus software block Wi-Fi connections?
Yes, some antivirus protection features (such as "Public Network Protection" or "Firewall Control") can block connections if they detect an unsafe network. Try temporarily disabling your antivirus to test.