The situation when Wi-Fi suddenly ends on a smartphone Samsung, is familiar to many users. The screen goes blank and you discover that the Internet has stopped working, although the router is in the next room. This is annoying, especially during an important conversation or downloading files.
The reasons can be completely different: from a simple software failure to physical damage to the antenna. In this article, we will look at the main scenarios why Android the connection is lost, and we will offer specific troubleshooting steps.
Do not panic if the problem occurs just once. However, if the ruptures become regular, it is necessary to carry out a diagnosis. Often the solution lies in energy saving settings, which the owner is not even aware of.
Temporary software glitches and system reboot
The first thing to do in case of any strange behavior in the smartphone is to restart the device. The operating system Android accumulates temporary files and cache that may conflict with the wireless module. A simple reboot clears the RAM and resets frozen processes.
Sometimes the problem lies not in the phone, but in the router. Routers are also mini-computers with their own operating system. If router works without interruption for months, its memory becomes full, and it begins to lose data packets or drop connections.
Do a hard reboot of both devices. Turn off your phone, unplug the router for 10-15 seconds, then turn on the router and wait until it boots up completely. Only then turn on your smartphone. This action solves most temporary glitches.
Before rebooting the router, take a photo of the sticker with the Wi-Fi password if you don’t remember it by heart. This will save time when reconnecting.
Energy saving settings and sleep mode
One of the most common reasons why Wi-Fi turns off on Samsungis an aggressive energy saving policy. The system attempts to conserve battery power by turning off the communications module when the screen goes dark or an app goes into the background. This is especially true for models of the series Galaxy A i M.
To check and change these settings, go to Settings → Connections → Wi-Fi. Click on the three dots in the top right corner and select More. Here you need to find the item “Power saving mode” or “Wi-Fi in sleep mode.”
Make sure that the switch is in the “Always” or “Never” position (depending on the firmware version). If “Only when the charger is connected” is selected, then the connection will be interrupted when operating on battery power. It's also worth checking the battery optimization settings for specific applications.
- 🔋 Go to the battery settings and turn off auto-optimization for instant messengers.
- 📡 Make sure that your Wi-Fi settings do not have an activity time limit.
- 🚫 Check if the “Ultra” or “Power Saver” mode is turned on, which blocks background data.
⚠️ Attention: Some third-party cleaning applications (Clean Master, DU Battery, etc.) can forcefully turn off Wi-Fi to save battery, ignoring system settings. Delete them or add them to exceptions.
IP address conflicts and DHCP settings
Sometimes the phone cannot receive the correct IP address from the router, which leads to constant interruptions. This happens if there is already a device on the network with the same address or if the DHCP address pool on the router is exhausted. In such cases, static IP configuration helps.
To do this, go to Settings → Connections → Wi-Fi. Click the gear next to your network, then select More or View Details. Find the “IP Settings” item and change the value from DHCP to “Static”.
You will need to enter the IP address manually (usually it 192.168.1.X or 192.168.0.X, where X is a number from 2 to 254). You also need to register the gateway (router address) and DNS (you can use Google DNS: 8.8.8.8). This eliminates addressing conflicts.
Which IP address to choose?
Choose an address that is significantly different from the addresses of other devices. For example, if the phone receives 192.168.1.35, try entering 192.168.1.150. The main thing is that the last digit does not coincide with other gadgets in the house.
Problems with the 2.4 GHz and 5 GHz frequency range
Modern routers operate in two bands: 2.4 GHz and 5 GHz. The 5 GHz band provides high speeds, but has a shorter range and is less capable of penetrating walls. If you are far from the router, the phone Samsung may try to hold onto a weak 5 GHz signal instead of switching to a stable 2.4 GHz.
As a result, the connection is constantly interrupted. The solution is to force a switch to 2.4 GHz in the Wi-Fi settings on your phone or separate the networks on the router, giving them different names (for example, Home_2G and Home_5G). For distant rooms, 2.4 GHz is often more stable.
It is also worth considering interference. The 2.4 GHz band is often overloaded with signals from neighbors, microwaves, and Bluetooth devices. If there are many networks in the house, the channel may be clogged, which causes lags and disconnections.
| Parameter | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Range | High (up to 50 meters) | Low (up to 20 meters) |
| Penetrating ability | Good (through walls) | Bad (walls jam the signal) |
| Transmission speed | Average (up to 150 Mbit/s) | High (up to 1 Gbit/s and higher) |
| Interference level | High (many neighbors) | Low (free air) |
Resetting network settings and deleting profiles
If software failures accumulate, the configuration of network connections may be damaged. In this case, resetting the network settings helps. This action will delete all saved Wi-Fi passwords, Bluetooth and mobile network settings, returning them to factory settings.
You can reset through the menu: Settings → General settings → Reset → Reset network settings. Confirm the action, after which the phone will reboot. You will have to re-enter the Wi-Fi password, but this often solves the problem of cyclic disconnections.
It is also useful to forget a specific network if the problem occurs with only one router. Click on a network in the list of available ones and select "Delete" or "Forget". Then connect again by entering the password.
☑️ Checklist before resetting the network
- 🗑️ Removing the network removes old, possibly incorrect security configurations.
- 🔄 Network reset updates network drivers and protocol stacks.
- 📝 Write down passwords from important networks before the procedure so as not to look for them.
Updating software and Wi-Fi module drivers
The company Samsung regularly releases security updates and bug fixes. Often patches contain bug fixes specifically for the wireless communication module. If you have an old firmware version, the problem may be a known bug that has already been fixed.
Check for updates in the Settings → Software update → Download and installationsection. If the update is available, connect to a stable Wi-Fi (if it works) or use mobile data to download.
Regular system updates are the easiest way to get fixes for critical communication errors that cannot be fixed manually.
In addition, some operators communications release access profile updates. Make sure your operator settings are also up to date. Sometimes re-registering on the network helps: turn airplane mode on and off.
⚠️ Attention: If the problem appears for the first time after a software update, the new firmware version may have a conflict with your router. In this case, try resetting the router settings or rolling back the phone software version (if possible).
Hardware faults and antenna
When all software methods have been exhausted, and Wi-Fi continues to turn off, there is a high probability of a hardware problem. The antenna module in smartphones Samsung is a thin cable or contact on the board that could come off when dropped or exposed to moisture.
Symptoms of hardware failure: Wi-Fi does not turn on at all (the button is gray), the phone does not see any network, or the signal disappears if you lightly press on the case in a certain place. The module may also overheat.
If you notice that the problem appeared after an impact or contact with water, repairing it yourself is risky. Requires diagnostics at a service center. Replacing the antenna module or soldering the contact often solves the problem radically.
Is it possible to warm up the phone with a hairdryer?
No, that's a myth. Heating may temporarily improve contact, but will ultimately kill the battery and screen. Do not use traditional heating methods.
Frequently asked questions (FAQ)
Why does Wi-Fi turn off only at night?
This may be due to energy saving settings that are activated on a schedule, or automatic application updates that overload the channel. Also check if you have traffic or time limits.
Will resetting network settings delete my photos and contacts?
No, resetting network settings (Reset Network Settings) only affects connection settings: Wi-Fi passwords, paired Bluetooth devices and mobile network settings. Your personal files, photos and contacts will remain safe.
Does the case affect Wi-Fi signal reception?
Yes, if the case has a metal base, a magnetic clasp or too thick walls. Metal shields the signal. Try removing the case and checking the stability of the connection.
What to do if Wi-Fi works, but there is no Internet?
Check the date and time on your phone - incorrect time settings break SSL certificates. Also try changing the DNS in the Wi-Fi settings to 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).