Today's smartphones are more than just a phone, but a fully-fledged mobile office and entertainment center that often doubles as a router. Owners of this popular model Samsung Galaxy M31 We often need to share internet access with other devices, whether a laptop, tablet, or a friend's phone. The feature that turns your device into a router is called "Mobile Hotspot" and is built into the Android operating system with One UI.
In this article, we'll cover the process of activating and setting up internet tethering in detail. You'll learn how to choose the right frequency band for maximum speed and best compatibility with older devices. We'll also cover security issues to prevent unauthorized users from connecting to your network.
Using a smartphone as a modem is a standard procedure that doesn't require installing any additional software. However, there are nuances that affect connection stability and data usage. Understanding these mechanisms will allow you to effectively manage your connection and avoid unpleasant surprises with your mobile operator's balance.
⚠️ Note: The menu interface may vary slightly depending on the version of the operating system installed and the One UI updates that Samsung regularly releases. If you don't see the item with the specified name, search for a similar one or consult the latest manual in your device's settings.
Checking mobile network and tariff settings
Before you activate the hotspot, you need to make sure that your smartphone has Internet access. Mobile data must be enabled, and the network signal must be stable. Without an active 4G/LTE or 3G connection, data sharing is technically impossible, as the phone will have nothing to broadcast to other devices.
It's crucial to check your data plan with your carrier. Many carriers allocate a separate gigabyte package specifically for tethering. If you attempt to tether more data than your plan allows, your speed may be artificially limited to a minimum or additional fees may apply.
The easiest way to check the current status of your connected services and remaining data is to use your operator's proprietary app or a USSD command. Make sure your account has sufficient funds and your data service isn't blocked.
- 📶 Check the network indicator at the top of the screen - it should show 4G, LTE, or H+.
- 💰 Make sure your plan has available traffic for sharing.
- 📱 Make sure your SIM card is active and not blocked.
Step-by-step activation of the hotspot on the Samsung M31
The process of enabling modem mode on Samsung Galaxy M31 The interface developers have simplified it as much as possible. The standard path is through the main settings menu, where all connection parameters are located. There's no need to search for hidden engineering menus or download third-party apps.
Open the menu Settings and find the section ConnectionsThis is where all the switches related to wireless interfaces are located. We are interested in the item Mobile hotspot and modemBy clicking on it, you will be taken to a submenu for managing distribution functions.
☑️ Access point activation algorithm
In the window that opens, you'll see the "Mobile Hotspot" toggle. Toggle it on. The system may warn you that using this feature may increase battery and data consumption. Confirm your action, and in a few seconds, your phone will begin broadcasting a Wi-Fi signal.
Once enabled, an icon resembling a chain or radio waves will appear in the status bar (at the top of the screen). This indicates that the device is ready to receive connections. You can now search for the network on the connected device.
Setting up a network name and security password
By default, the smartphone creates a network with a name containing the device model, for example, Galaxy M31, and a random set of numbers. However, for ease of use and personal security, it's best to change these settings. The default password is often difficult to enter manually, and the network name isn't always clear to the owner.
To change the settings while in the menu Mobile hotspot, click on the text label with the function name, not the switch. This will open the configuration screen. In the field Network name Enter any name you like in Latin characters. This name will be visible to other users when searching for available connections.
In the field Password Choose a character combination that is easy to remember but difficult to guess. The minimum password length is usually 8 characters. Using complex characters increases level of protection your personal information from unauthorized access.
⚠️ Caution: Never leave your hotspot open (without a password). Anyone within range will be able to connect to your internet, which will not only reduce your speed but also compromise the data transmitted through your connection.
Save your changes by clicking the "Save" button at the top of the screen. The network will then restart with the new settings. All previously connected devices will need to be reconnected using the new password.
Choosing a Frequency Band: 2.4 GHz vs. 5 GHz
One of the key settings that affects connection quality is the choice of frequency range. Samsung Galaxy M31 Supports dual band operation: 2.4 GHz and 5 GHz. Understanding the differences between them will help you optimize your connection for specific tasks.
The 2.4 GHz band is more common and compatible. It provides greater signal coverage and penetrates walls better, but is often congested by neighboring routers and household appliances, which can reduce speeds. It's a universal choice for older laptops or devices located far from the phone.
The 5 GHz band offers significantly higher data transfer rates and is less susceptible to interference. However, it has a shorter range and is less able to penetrate obstacles. This mode is ideal for watching high-definition video or online gaming, as long as the receiving device is nearby.
How to switch frequency manually?
To change the band, go to Settings → Connections → Mobile Hotspot → Tap the network name (or the Advanced/Configuration button) → Find "Band" or "Frequency" and select 2.4 GHz or 5 GHz. Save the settings.
To switch the range, find the item in the access point settings menu RangeSelect the desired value. If you're unsure, leave it at "Auto" or "2.4 GHz" for maximum compatibility.
Managing connected devices and limits
You can control who is connected to your network through a list of approved devices. There's an option in the access point menu. Permitted devicesThis displays all the gadgets currently using your internet connection. You can see their MAC addresses and names.
The blocking feature for unwanted clients is very simple. You can select a specific device from the list of connected devices and block its access. After this, the device will be disabled and will not be able to reconnect until you add it back to the allowed list.
It's also important to mention the "Traffic Limit" feature. It allows you to set a limit on the amount of data that can be transferred via the hotspot. This is a useful feature if you have metered data and want to avoid overspending.
| Parameter | Function Description | Recommended value |
|---|---|---|
| Max. number of devices | Limit of simultaneous connections | 3-5 devices |
| Time-out | Time before shutdown when there are no clients | 10 minutes |
| Frequency range | Wi-Fi radio signal frequency | 2.4 GHz (compatible) |
| Security protocol | Password encryption type | WPA2 PSK |
Setting a timeout helps conserve battery life. If no one connects to the hotspot for a specified period of time (e.g., 10 minutes), the smartphone will automatically disable Wi-Fi sharing.
Energy optimization and problem solving
Hotspot mode is one of the most power-consuming modes for a smartphone. Wi-Fi module operates in continuous transmission mode, which leads to rapid battery discharge and heating of the case Samsung M31For long-term operation, it is recommended to keep the phone connected to the charger.
If you notice your internet connection is slow or frequently disconnecting, try restarting your smartphone. This will clear temporary files and resolve network errors. It's also worth checking to see if any background apps are actively downloading updates or making backups, which are consuming your bandwidth.
In some cases, carriers may block data sharing. If the hotspot is enabled and devices connect, but the internet isn't working, try changing the setting. APN (Access Points). Copy the settings of the existing access point, create a new one with the same parameters, but change the APN type to dun (or add ,dun to the existing type).
⚠️ Warning: Changing APN settings may cause mobile internet to stop working on your smartphone. Write down the original settings before making changes so you can easily restore them.
Monitor your device's temperature. If the smartphone's case becomes too hot, the system may automatically disable the hotspot to protect its components. In this case, take a break, remove the case, and let the device cool down.
Frequently Asked Questions (FAQ)
Why does the laptop see the network but not connect to it?
Most often, the problem lies in an incorrectly entered password or incompatible encryption protocols. Try "forgetting" the network on your laptop and re-entering the password. Also, check if there's a limit on the number of connected devices in your phone settings.
Is it possible to share Wi-Fi if it is connected to Wi-Fi itself?
On most modern smartphones, including Samsung M31 With Android 10 and above, the Wi-Fi Repeater feature may be missing or hidden. Typically, a phone can either receive Wi-Fi or broadcast mobile data. However, some models allow broadcasting an existing Wi-Fi signal, but this depends on the specific firmware version.
How do I know who is connected to my hotspot?
Go to the menu Mobile hotspot and click on the item Connected devices (or similar). A list of all active clients with their names and MAC addresses will be displayed. You can also block an unknown user from there.
Why does the battery drain quickly when the hotspot is turned on?
Modem mode requires the radio module to be constantly transmitting, which consumes significant current. Furthermore, if the cellular signal is weak, the phone increases its transmit power, further accelerating battery drain. It is recommended to use an external power supply for extended use.
Does Wi-Fi sharing affect the internet speed on the phone itself?
Yes, the bandwidth is shared between all connected devices. If you download a large file on your laptop, page loading speed on your smartphone may noticeably drop. The bandwidth becomes a shared resource.