A situation where a Samsung smartphone stops detecting a wireless network or is stuck indefinitely on the "Obtaining IP address" status can throw any user off balance. Mobile Internet Often charged, home Wi-Fi seems like the only way to download content or work. However, instead of the familiar icon in the top bar of your screen, you see a crossed-out circle or an exclamation point, indicating a lack of internet access.
Connection problems may be software related to errors in the operating system. One UI This can be either an Android device or a hardware issue, where the communication module is physically damaged. Before taking the device to a service center, it's best to rule out simple configuration errors in the router or the device itself. Often, a simple reboot or changing the encryption settings can solve the problem.
In this article, we will examine in detail the diagnostic and connection restoration algorithms for devices of various series, from budget models of the series Galaxy A to the flagship Galaxy SYou'll learn how to reset network settings, check your MAC address, and set up a static IP if automatic address assignment isn't working correctly.
Primary diagnostics and simple solutions
The very first step, often ignored in hopes of a miracle, is a simple hardware reboot. Routers running for days without interruption accumulate cache errors, which causes the DHCP server to freeze. Unplug the router for 15-20 seconds, then plug it back in and wait until it fully boots up and all the lights come on.
At the same time, you need to reboot the smartphone itself. This action clears the RAM and restarts the system services responsible for radio moduleIf your Samsung phone still won't connect to Wi-Fi after turning it on, check if Airplane Mode is enabled. Sometimes the system gets stuck in this mode, requiring a double-tap: turn on Airplane Mode, wait 10 seconds, and then turn it off.
⚠️ Important: If you are using a public network with browser authentication (captive portal), make sure the login page is not blocked by DNS security settings.
It's also worth paying attention to the date and time. Incorrect timestamps can cause security certificate conflicts, causing the phone to reject connections to WPA2/WPA3 secured networks. Set automatic time synchronization via your carrier's network or manually set the correct values.
Reset network settings on Samsung
If simple methods fail, the most effective solution is a full network reset. This procedure deletes all saved Wi-Fi passwords, Bluetooth device settings, and mobile network configurations, returning them to their factory defaults. This often resolves conflicts that arose after updating firmware or installing new apps.
To perform the operation, go to the menu Settings → General settings → ResetHere, select "Reset network settings." The system will warn you that all data will be deleted, but personal files, photos, and contacts will remain. After confirming, the phone may reboot.
☑️ Network reset algorithm
Once the process is complete, re-enter your wireless network password. If the "Unable to connect" or "Incorrect password" error persists, the issue may not be with your phone, but with your router's security settings, which are incompatible with your smartphone's current software.
It's important to understand that resetting your network won't affect your Google or Samsung accounts. However, you'll need to re-pair smartwatches, wireless headphones, and other devices, as their profiles will be deleted from your phone's memory.
MAC address and filtering issues
Modern versions of Android and the One UI shell use a randomized MAC address for each Wi-Fi connection by default for privacy purposes. This means the phone appears to the router as a new device each time. If MAC address filtering (whitelisting) is enabled on the router, the connection will be blocked.
To fix this, go to Wi-Fi settings, click the gear next to your network name (or select "Manage network settings" before connecting). Find the "MAC Address Type" option and switch it from "Randomized MAC" to "Device MAC Address." This will force the phone to use its permanent physical address.
| Parameter | Default value | Recommended value | Impact on connection |
|---|---|---|---|
| Privacy | High | Standard | Simplifies authorization in older routers |
| MAC address | Randomized | Device address | Required for White List filtering |
| EAP protocol | Not specified | No | Required for corporate networks |
| Anonymous person | Empty | Empty | Affects hiding of username |
After changing the MAC address type, the phone will disconnect and attempt to reconnect. If your router is configured with strict MAC address restrictions, you may need to add your Samsung's new (permanent) address to the list of allowed devices through the router's web interface.
Where can I find my MAC address?
You can find the permanent address in the menu "About phone" → "Software information" → "Status information" → "Wi-Fi MAC address." It consists of 12 characters in the format XX:XX:XX:XX:XX:XX.
IP conflicts and DNS settings
A common reason why Samsung displays the "Obtaining IP address" message and then returns an error is a full DHCP address pool on the router or an IP address conflict. In this case, switching the IP settings to static mode helps. This assigns a specific address to the phone on the local network, bypassing dynamic distribution.
In the settings menu for a specific Wi-Fi network, select "IP Settings" and switch from DHCP to "Static." You'll need to enter the following information (example for standard networks): IP address (e.g., 192.168.1.125), gateway (usually 192.168.1.1), and network prefix length (24). DNS can be left as automatic or specified using Google's public DNS servers: 8.8.8.8 and 8.8.4.4.
⚠️ Important: When selecting a static IP, make sure the selected address is not occupied by another device on the network, otherwise a conflict will occur and both devices will not work.
Using alternative DNS servers can also solve the problem when Wi-Fi is officially connected, but the internet is down. ISPs sometimes provide unstable DNS servers that respond slowly to queries, creating the illusion of a disconnected connection.
Impact of the 2.4 GHz and 5 GHz frequency bands
Modern routers often broadcast two networks: 2.4 GHz and 5 GHz. The 5 GHz band provides high speeds, but has a shorter range and is less effective at penetrating walls. If your Samsung phone is far from the router, it may try to connect to the 5 GHz band, lose signal, and constantly reconnect, which appears as a connection error.
Try forcing a switch to the 2.4 GHz network if it's available separately. For older smartphone models, this may be the only way to ensure stable operation, as their antennas don't always work correctly with modern 5 GHz channel standards.
It's also worth checking the channel width in your router settings. For the 2.4 GHz band, the most stable width is 20 MHzSetting the value 40 MHz or "Auto" in apartment buildings often leads to strong interference from neighboring networks, which causes constant disconnections on the phone.
Software update and factory reset
If the software failure is severe, a system update may be required. Go to Settings → Software Update → Download and InstallSamsung regularly releases patches to fix communication module issues. Ensure the battery charge is above 50% before starting the process.
As a last resort, when all else fails, perform a hard reset. This is a drastic measure that erases all data from the phone. Before doing this, be sure to create a backup via Samsung Cloud or Smart Switch. After the reset, the phone will be as good as new, and if the problem was software-related, it will be gone.
Physical damage shouldn't be ignored either. Drops or exposure to moisture could have disrupted the antenna cable connection. In such cases, software solutions are ineffective, requiring the intervention of service center engineers.
Why does the phone see the network, but says "Incorrect password"?
This most often occurs due to a router password change, when the phone attempts to use saved old data. Another possible cause could be an incorrect encryption type (for example, the router is set to WPA3, but the phone only supports WPA2). Try "Forget the network" and re-enter the password, checking the keyboard layout.
What should I do if Wi-Fi turns on and then immediately turns off?
This is a classic symptom of a driver failure or overheating. Try starting the phone in safe mode (by holding down the power button and selecting the appropriate option). If the problem resolves in safe mode, a third-party app that's interfering with the network is to blame.
Can a case interfere with Wi-Fi on a Samsung?
Yes, metal cases or cases containing metal plates can block the signal, especially at 5 GHz. Remove the case and check the reception. Magnetic fasteners can also interfere with the antennas.