The infinite freezing of the smartphone in the “Obtaining an IP address” status or the appearance of an exclamation mark instead of Wi-Fi bars indicates a specific synchronization failure between the Android communication module and the router settings. This error blocks access to the Internet even when the network is visible and is most often caused by a software conflict in encryption protocols or incorrect distribution of addresses in the DHCP server, less often by a hardware malfunction of the Wi-Fi module.
Before you panic and take the gadget to a service center, it is worth conducting a thorough diagnosis. In 80% of cases, restoration of functionality takes no more than 10 minutes and does not require special knowledge or expensive equipment. We will analyze the main failure scenarios, from a banal driver freeze to complex problems with encryption protocols. Your task is to consistently eliminate possible causes, moving from simple to complex.
Sometimes the device simply “forgets” how to correctly establish a connection with a specific access point. This can happen after updating the firmware, changing the password on the router, or even after rebooting the router. It is important to understand that the message “Saved” or “Connected” does not always mean that you have real access to the global network. Next, we will look at detailed action algorithms for each type of failure.
Basic diagnostics and primary actions
First of all, it is necessary to exclude the most obvious reasons for the lack of communication. Often, users try to connect their phone to a network that does not actually distribute the Internet, or the router itself is frozen and requires a reboot. Try turning Wi-Fi off and on on your smartphone through the notification shade. If this does not help, perform a full reboot cycle of the device.
Pay attention to other gadgets in the house. If the laptop or tablet also does not see the network, the problem is definitely on the side of the provider or router. In the case when other devices are working properly, but your Android not, the focus shifts to the phone settings. Check to see if Airplane mode is accidentally turned on, which blocks all radio modules.
⚠️ Attention: If your router worked stably for a long time, and the problem arose suddenly after a power surge, the antenna or power supply of the router may have failed. Check the indicators on the device body.
Sometimes a simple trick of switching network modes helps. Go to the settings and try to forget the current network, and then connect again, carefully entering the password. Make sure you do not mix up case letters or symbols. An error in one digit of the WPA2 security key can cause the phone to endlessly try to log in.
Problems with obtaining an IP address and DHCP
One of the most common errors is freezing at the “Obtaining an IP address” stage. This means that the phone sees the router, but cannot receive a digital pass to the local network from it. The protocol DHCPis responsible for this process. If the DHCP server on the router is frozen or has reached its address limit, the connection will not work.
In such cases, the method is to manually configure a static IP address. You need to go to the advanced settings of your Wi-Fi network on your phone and change the IP Settings option from DHCP to Static. Here you will need to enter the address manually, for example 192.168.1.128, the gateway (usually 192.168.1.1) and the length of the network prefix 24.
Before changing the IP settings, find out the exact gateway address of your router. It is usually indicated on a sticker on the bottom cover of the device or in the provider's documentation.
An IP address conflict can also cause a failure. If two devices on the network try to occupy the same address, one of them will be disabled. Static setting allows you to assign a unique address to your smartphone, eliminating the possibility of conflict. This is especially true in apartments with a large number of smart devices.
| Parameter | Default value (DHCP) | Recommended static value | Description |
|---|---|---|---|
| IP address | Automatic | 192.168.1.150 | Unique address of the device on the network |
| Gateway | Automatic | 192.168.1.1 | Address of your router |
| Prefix length | 24 | 24 | Subnet mask (usually 255.255.255.0) |
| DNS 1 | Automatic | 8.8.8.8 | Primary domain name server (Google) |
After entering the data, save the settings and try to connect again. If the status changes to “Connected,” then the problem was precisely in the automatic distribution of addresses. In rare cases, you may need to reboot the router to reset the address lease table.
Conflicts of frequencies and encryption standards
Modern routers often operate in two bands: 2.4 GHz and 5 GHz. Old smartphone models or budget devices may simply not see the 5 GHz network, since their Wi-Fi module does not support this standard 802.11ac or ax. Conversely, a new phone can ignore the congested 2.4 GHz band if the settings give priority to five.
Another hidden problem is the type of network security. If your router is set to an outdated encryption method WEP or mixed mode WPA/WPA2, some versions of Android may refuse to connect for security reasons. Google recommends using exclusively WPA2-Personal or WPA3.
Why does 5 GHz work worse through walls?
The 5 GHz signal has a shorter wavelength, which provides high speed, but penetrates much worse through concrete walls and furniture compared to 2.4 GHz.
Check the broadcast channel settings. There are only 13 channels in the 2.4 GHz band, and if neighbors use the same channel, interference occurs. Try setting the router settings to a fixed channel (for example, 1, 6 or 11) instead of automatic selection. This often stabilizes the connection on older devices.
⚠️ Attention: The router settings interface differs between different manufacturers (TP-Link, Asus, Keenetic). The logic of the actions is the same, but the names of the menu items may vary. Check the instructions for your specific equipment.
Android network settings malfunctions
Sometimes a software failure accumulates in the system files responsible for the network stack. The phone “remembers” erroneous configurations and applies them every time you try to connect. In this case, resetting the network settings will help. This procedure will not delete your photos or contacts, but will clear all saved Wi-Fi passwords and Bluetooth pairs.
To perform a reset, go to menu Settings → System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settings. The path may vary slightly depending on the manufacturer's shell (MIUI, OneUI, ColorOS). After confirming the action, the phone will reboot the network modules.
- 📱 This operation deletes all saved access points and passwords.
- 🔌 VPN and mobile data settings are reset (APN).
- 🎧 All active connections with Bluetooth headsets are terminated.
If the problem persists after the reset, a third-party application may be to blame. Antiviruses, firewalls or traffic saving apps may block the connection. Try booting your phone into safe mode. If Wi-Fi works stably in this mode, it means that the conflict is caused by one of your installed applications.
☑️ Diagnosing a software failure
The impact of energy saving and sleep mode
Aggressive energy saving algorithms in modern versions of Android often disable the Wi-Fi module, when the screen goes dark to save battery power. This leads to the fact that when the phone wakes up, it cannot quickly restore the connection or completely loses the network. This feature is called “Pause Wi-Fi in sleep mode.”
To disable this option, go to the advanced Wi-Fi settings. Find the option “Pause Wi-Fi connection in sleep mode” and set it to “Never”. On some models, this item is hidden in the “Advanced” menu or is only available through the engineering menu.
Also check the settings of a specific application that cannot access the network. In the “Battery” or “Applications” section, find the software you need and make sure that background data transfer is allowed for it and the “Energy Saving” option is disabled. The system can limit the background activity of instant messengers or email clients.
Disabling the “Pause Wi-Fi in sleep mode” option guarantees stable receipt of notifications, but may slightly increase battery consumption in standby.
Hardware malfunctions of the Wi-Fi module
If all software methods have been exhausted, and the phone still does not connect to the network (or the Wi-Fi button is inactive and gray), there is a high probability of a hardware failure. A wireless communication module is a separate chip on the motherboard that could fail due to overheating, shock, or a manufacturing defect.
A common symptom is when the phone sees networks and connects to them, but after a minute the connection is lost, and so on in a circle. This may indicate a failure of the antenna wire soldering or degradation of the chip itself. In such cases, a soft reset will not help.
Diagnostics can be carried out by running an engineering test. Enter the code ##4636## in your phone (works on pure Android and many shells). In the Wi-Fi Information menu, check the connection status and signal strength. If the status constantly changes or shows an error, the problem is physical.
⚠️ Attention: Self-repair of the Wi-Fi module requires soldering skills and the presence of a hot air gun. If the phone is under warranty, any opening will result in its loss. Contact an authorized service.
Frequently asked questions (FAQ)
Why does the phone connect to Wi-Fi, but there is no Internet?
Most often this is a problem on the side of the provider or router that does not receive the external IP. It is also possible that the DNS servers in the phone settings are entered incorrectly. Try installing static DNS from Google (8.8.8.8).
What to do if the Wi-Fi button is gray and cannot be pressed?
This is a sign of a serious driver failure or hardware failure. Try a full factory reset. If this does not help, you will need to replace the motherboard or resolder the chip in the service.
Can a case interfere with Wi-Fi?
Yes, if the case contains metal inserts or a too thick layer of material with a metallized coating. This shields the signal. Try removing the case and checking the connection.
How do I know if my phone supports 5 GHz?
Look at the technical specifications of the model on the manufacturer’s official website. Look for support for 802.11ac or 802.11ax standards. If only 802.11n or b/g is specified, then the 5 GHz band is not supported.
Does changing the MAC address help when connecting?
Yes, in the Wi-Fi privacy settings you can select “Use device MAC address” instead of “Random MAC address”. Some old routers do not work correctly with address randomization.