The situation when your loved one suddenly refuses to go online is familiar to many users. You see the treasured network icon in the list of available ones, enter the password, but instead of the treasured “Connected”, the system gives the error “Obtaining an IP address” or simply hangs endlessly at the “Connection” stage. This can happen at the most inopportune moment: during an important call via instant messenger or when downloading a large system update. Android-based smartphone suddenly refuses to go online, familiar to many users. You see the treasured network icon in the list of available ones, enter the password, but instead of the treasured “Connected”, the system gives the error “Obtaining an IP address” or simply hangs endlessly at the “Connection” stage. This can happen at the most inopportune moment: during an important call via messenger or when downloading a large system update.
Most often, the problem lies not in a physical breakdown of the communication module, but in a software conflict or incorrect router settings. Before taking the device to a service center, it is worth conducting independent diagnostics. In this article we will analyze in detail all possible scenarios, from a banal failure in the router to complex static IP settings.
Sometimes the solution lies on the surface: just reboot the equipment. However, if simple methods do not help, you need to delve into the technical details of security protocols and frequency bands. Let's consistently eliminate all possible causes of problems.
Basic equipment diagnostics and reboot
The first and most effective step for any network problems is a complete reboots all participants in the process. Many users ignore this advice, believing that turning off the phone screen is enough to reset network settings. In fact, the module Wi-Fi continues to work in the background, saving an error cache.
You need to turn off the power to the router by unplugging the power cord from the outlet and wait at least 15-20 seconds. This time is needed for the capacitors to discharge and the device’s RAM to clear. At the same time, completely reboot your smartphone through the power menu.
After turning on the equipment, try connecting again. If the problem persists, check if other devices are connecting to the same network. If the laptop or tablet is working normally, then the problem is localized to the phone. If there is no Internet anywhere, the reason lies in the provider or the router settings.
⚠️ Attention: If the indicators on the router are blinking in an unusual mode (for example, only the power light is on), the router firmware may have frozen. In this case, you may need to reset to factory settings via the button
Reseton the rear panel.
☑️ Network diagnostics
Problems with password entry and encryption type
One of the most common causes of authentication errors is a simple typo when entering the security key. Passwords WiFi networks often contain complex combinations of characters, and one wrong letter can result in access being denied. In this case, the Android system may write “Authentication Error” or endlessly try to connect.
It is important to take into account the case of letters and the keyboard layout. Try displaying the entered password by clicking on the eye icon in the input field to visually verify the correct characters. It's also worth checking to see if the feature T9 or auto-correction is enabled, which can silently change the characters you enter.
Another critical point is the type of encryption used on the router. Modern smartphones may not work correctly with outdated security protocols, such as WEP or earlier versions WPA. It is recommended to set encryption in the router settings WPA2-PSK (AES) or WPA3if your device supports it.
- 🔑 Check the keyboard layout: users often enter Russian letters instead of English.
- 📱 Use the "Show password" function to visual verification of characters.
- 🔒 Make sure that the modern WPA2 or WPA3 encryption standard is selected on the router.
What to do if you forgot your password?
If you do not remember the WiFi password, but you have access to the router via cable or from another connected device, go to router web interface (usually 192.168.0.1 or 192.168.1.1). In the "Wireless Mode" or "Wireless Security" section you can view the current key or install a new one. Also, the password is often written on a sticker on the bottom of the router if you did not change it after purchase.
IP address conflicts and DHCP settings
When Android writes "Obtaining an IP address" and then gives an error, this almost always indicates a problem with the protocol DHCP. The router cannot give the phone a unique address on the local network, or the issued address conflicts with the address of another device.
In the WiFi settings on your smartphone, you can try changing the IP method from “DHCP” to “Static”. To do this, click on the gear icon or hold your finger on the network name in the list of available connections and select “Change network” or “Advanced.”
You will need to manually enter the data. Typically, the gateway address is the same as the router address (for example, 192.168.1.1). The IP phone address must differ from the gateway address only in the last digit, for example 192.168.1.150. Leave the subnet mask as standard 255.255.255.0.
| Settings parameter | Default value (example) | Recommended static value |
|---|---|---|
| IP address | Dynamic (DHCP) | 192.168.1.128 |
| Gateway (Router) | 192.168.1.1 | 192.168.1.1 |
| Network prefix length | 24 | 24 |
| DNS 1 | Automatic | 8.8.8.8 (Google) |
⚠️ Attention: When setting a static IP address, make sure that the selected address is not occupied by another device on your network. It is better to choose addresses from a range that the router does not automatically distribute (usually addresses above 192.168.1.100).
The influence of the 2.4 GHz and 5 GHz frequency ranges
Modern routers often operate in two bands: 2.4 GHz and 5 GHz. Older smartphone models may simply not see 5 GHz networks, since their communication modules do not physically support this standard. Conversely, new phones may prefer 5 GHz, but have difficulty connecting if the signal is weak.
The 2.4 GHz band has better penetration through walls, but it is heavily congested by neighborhood networks and household appliances like microwaves. The 5 GHz band provides high speed, but the signal fades faster when passing through obstacles.
Try to separate the networks in the router settings by assigning them different names (SSID), for example, HomeWiFi_2.4 and HomeWiFi_5G. This will allow you to manually select on your phone the network that works more reliably in a particular room. If your phone is old, choose only 2.4 GHz.
If your router supports the Smart Connect feature, try disabling it. Sometimes automatic switching between frequencies causes disconnections on Android smartphones.
Resetting network settings on Android
If the above methods did not help, the system may have accumulated network configuration errors. Resetting the network settings will return the settings Wi-Fi, Bluetooth and mobile data to the factory state. This is a safe procedure that will not delete your personal files, photos or applications.
To perform this operation, go to the menu Settings → System → Reset settings (the path may differ depending on the model, for example, Settings → General settings → Reset). Select "Reset Wi-Fi, mobile data and Bluetooth settings."
After confirming the action, the phone will reboot. You will have to re-enter your home network password for Bluetooth headphones or watches. However, this often solves problems with freezing at the stage of obtaining an IP address.
- 🔄 Resetting will delete all saved WiFi networks and their passwords.
- 📶 Mobile hotspot settings will also be reset.
- 📲 Paired Bluetooth devices will need to be connected again.
⚠️ Attention: Before resetting, make sure that you remember the password for your WiFi network, since it will be impossible to restore it from the phone’s memory after this procedure.
Resetting network settings is the “heavy artillery” of software methods. If this does not help, the problem is most likely hardware or related to the router firmware.
Hardware faults and airplane mode
Sometimes the reason is trivial: accidentally activated airplane mode. Check your notification shade to make sure the airplane icon is not lit. In this mode, all wireless modules are forcibly disabled by software.
A more serious problem is the physical breakdown of the Wi-Fi module. This can happen after the phone has been dropped, exposed to moisture, or due to a manufacturing defect. If nothing is displayed in the list of available networks, even after resetting the settings, or the Wi-Fi item has become inactive (gray), this is an alarming signal.
In rare cases, flashing the device or updating the system to the latest available version helps. Go to Settings → About phone → System update and check for new software versions. Manufacturers often release patches that correct errors in communication drivers.
How to check the Wi-Fi module using the engineering menu?
On some devices you can enter a code ##4636## in the dialer. The testing menu will open. Select "Wi-Fi Details". If connection information and statistics are displayed there, the module is most likely working. If the menu does not open or displays an error, there may be a deeper problem.
Frequently asked questions (FAQ)
Why does the phone connect to WiFi, but there is no Internet?
This may indicate problems with the Internet provider, incorrect DNS settings on the router, or blocking access by MAC address. Try setting public DNS (8.8.8.8) in the network settings on your phone.
What does the "Saved, protected" error mean?
This error means that the phone has remembered the network and password, but cannot complete the connection. Most often, the reason is a mismatch in the type of encryption or a password that is too complex with characters that the phone interprets incorrectly.
Can a case interfere with Wi-Fi?
Yes, if the case has metal inserts or is made of thick material containing metal (for example, some shockproof models with aluminum frames), it can shield the signal antennas.
Why does Wi-Fi turn off by itself when the screen is locked?
In the Android energy saving settings there is an option “Turn off Wi-Fi in sleep mode”. Set the value to “Always” or “Only when connected to charging” so that the connection does not break.
How do I know if my phone supports 5 GHz?
Look at the technical specifications of the model on the manufacturer’s official website. If the specifications indicate the 802.11ac or 802.11ax (Wi-Fi 5/6) standard, then 5 GHz support is guaranteed. 802.11n can support both frequencies, but not always.