Modern smartphones such as Samsung Galaxy A31, have long ceased to be mere devices for making calls, having become full-fledged control centers for the digital space. Situations often arise when you need to provide global network access for a laptop, tablet, or other gadget, but a stationary router is not available. In such cases, the function mobile hotspot becomes a real lifesaver, allowing you to instantly turn your device into a portable router.
The process of activating this function on devices of the South Korean corporation is as simple as possible thanks to the shell One UIHowever, users often encounter security configuration nuances or problems with a stable connection. The Wi-Fi 5 (802.11ac) protocol supported by the Galaxy A31 provides theoretical data transfer speeds of up to 433 Mbps., which is quite sufficient for comfortable surfing and streaming. In this article, we'll walk you through all the setup steps in detail so you can share your internet connection without any complications.
Before we dive into the technical details, it's worth noting that data sharing quality directly depends on your cellular network signal strength and your carrier's data plan. Uncontrolled data sharing can lead to unexpected charges if you don't have an unlimited plan, so monitoring your data usage remains a top priority. Below, we'll look at a process that will get your network up and running quickly.
Basic hotspot setup on the Galaxy A31
To start using tethering mode, you need to activate the corresponding module in the system. This can be done in two main ways: through the quick settings panel or through the device's main settings menu. The first option is suitable for quick activation, while the second allows for more in-depth configuration before launch.
If you prefer to work from the notification shade, swipe down from the top of the screen to reveal the quick commands panel. Look for the icon labeled Access point and modem or simply Access pointIf the icon isn't immediately visible, swipe right or tap the three dots (or the edit button) to add it to a more visible location. Tap the icon, and the indicator will light up, signaling the mode's activation.
A more reliable way to avoid errors on first launch is to use the system settings. Go to the menu Settings, select a section Connections, and then click on the item Mobile hotspot and modemHere you will see a switch Mobile hotspotBefore activating it, it is recommended to click on the text part of the line to access the configuration menu.
☑️ Pre-launch check
In the window that opens, you can set the network name (SSID) and password. By default, the system generates a random name that includes the device model, for example, Galaxy A31_1234It's recommended to change it to something more recognizable, especially if you're in a crowded area with people using similar devices. The password should be complex enough to prevent unauthorized access to your communication channel.
⚠️ Note: If you change the network name or password, all previously connected devices will lose connection and require re-authorization with the new data.
Enhanced security and frequency range options
Deep configuration of the access point on Samsung Galaxy A31 Allows you to optimize your network for specific tasks. The access point configuration menu hides important settings that affect compatibility with older devices and maximum data transfer speed. Ignoring these settings may result in some devices simply not detecting your network.
One of the key options is the choice of frequency range. By default, modern smartphones often have the mode 2.4 GHz, which provides better signal range and compatibility with any equipment, even those manufactured ten years ago. However, this range is heavily congested in apartment buildings, which can reduce actual speeds.
If your connected devices support the 5 GHz standard, it makes sense to switch to it. This will provide a more stable connection and higher speeds, but the signal range will be significantly reduced. To switch, click AP range and select the desired value. You can also configure the security level here, where the optimal choice is the protocol WPA3-Personal or WPA2-Personal.
- 📡 2.4 GHz: Better coverage, high compatibility, but susceptible to interference.
- 🚀 5 GHz: High speed, minimal interference, but shorter range.
- 🔒 WPA3: Maximum password protection against guessing, supported by new devices.
- 📶 WPA2: A security standard that guarantees compatibility with older laptops and consoles.
This section also includes the "Show Device" feature, which allows other Galaxy users to see your hotspot in their list of recommended networks without entering a password if they're in your contacts. For privacy reasons, it's best to keep this feature disabled in public places.
The impact of encryption on speed
Using modern encryption protocols like WPA3 requires more processing power from the smartphone's processor. On the Galaxy A31, this can lead to a slight but noticeable increase in power consumption and heat during active data transfers. If speed is critical and security is secondary (for example, in an isolated environment), a less demanding protocol may be appropriate, although WPA2 remains the gold standard.
Managing connected devices and limits
Controlling who uses your internet is a crucial part of setting up a hotspot. Samsung Galaxy A31 Provides convenient tools for monitoring active connections and limiting their number. This helps prevent channel congestion and unauthorized traffic use.
There is a section in the access point menu Connected devicesThis displays a list of all devices currently consuming your data. You can see the device's name and the amount of data transferred. If an unfamiliar user appears on the list, you can block them directly from this menu by clicking the corresponding option, which will immediately terminate the connection.
To prevent bandwidth overload, it's recommended to set a limit on the number of connected devices. The default value is usually 10, but for stable smartphone operation, it's best to reduce this to 3-5 devices. Exceeding this limit can cause the phone itself to slow down, and the internet to become unavailable to everyone.
The sleep timer feature deserves special attention. You can set the hotspot to automatically turn off if no device is connected for a certain period of time (e.g., 5 or 10 minutes). This prevents the battery from draining if you forget to turn off tethering.
| Parameter | Recommended value | Impact on work |
|---|---|---|
| Max devices | 3-5 pcs. | Speed stability and heat reduction |
| Sleep timer | 5 minutes | Saving battery life |
| Range | 5 GHz (if possible) | Increasing throughput |
| Security | WPA2/WPA3 | Protecting data from interception |
Sharing the Internet via USB and Bluetooth
While Wi-Fi is the most popular method of sharing, there are scenarios where a wireless connection is not suitable due to security requirements or the need to conserve battery power. In such cases Galaxy A31 allows you to use a wired connection via USB or the slower but more energy-efficient Bluetooth.
A USB modem is ideal for desktop use with a laptop. It not only transmits internet but also charges your smartphone, which offsets its high power consumption. To activate, connect your phone to the computer with a cable, go to Settings → Connections → Mobile hotspot & tethering and turn on the switch USB modemThe computer will automatically recognize the new network connection.
⚠️ Please note: For the USB modem to work on your computer, you may need drivers that are usually installed automatically in Windows 10/11, but in older versions of the OS (Windows 7 and below), you may need to install Samsung Smart Switch.
A Bluetooth modem is less commonly used due to its low data transfer speed, but it consumes significantly less power than a Wi-Fi module. To set it up, you must first pair your phone and the receiving device via Bluetooth. After successful pairing, enable the "Pairing" option in the access point menu. Bluetooth modemOn the receiving device, in the Bluetooth settings, you need to select the option to access the network through the connected device.
It's worth noting that when using a USB cable, the speed will be limited by the port and cellular network, but the ping (latency) is usually lower and more stable than over the air. This makes the wired method preferable for video calls or online gaming, where every millisecond counts.
Connection problems and their solutions
Even with proper configuration, users may encounter situations where devices don't see the network or can't connect to it. Most often, these issues stem from software glitches in the shell. One UI or a network settings conflict. Understanding the cause allows you to quickly resolve the issue without calling a service center.
One common issue is incompatibility of security protocols. If your old device can't connect, try changing the security type from WPA3 to WPA2 or even WPA, although the latter is less secure. Changing the broadcast channel also helps if there are too many neighboring networks in the air.
If you have internet access on your connected device but pages aren't loading, check your DNS settings. Sometimes your mobile provider blocks certain requests. In this case, resetting your phone's network settings can help. To do this, go to Settings → General Settings → Reset → Reset Network SettingsPlease note that this action will delete saved Wi-Fi passwords and Bluetooth settings.
- 🔄 Reboot: Simply turning your phone off and on solves 80% of Wi-Fi module problems.
- 📶 Airplane mode: Turning airplane mode on and off restarts the radio modules.
- 🔋 Energy saving: Make sure that Power Saving Mode doesn't restrict background network services.
- 📝 Traffic limit: Check if your operator's daily or monthly tariff limit has been reached.
In rare cases, the problem may be with your mobile operator, blocking internet tethering (TTL technology). If you notice a sudden drop in speed or the connection drops when connecting a laptop, your plan may not support using your phone as a router.
Optimizing power consumption when operating an access point
Modem mode is one of the most energy-intensive processes for a smartphone. Active radio operation, constant data exchange, and, in the case of Wi-Fi, signal emission lead to rapid battery drain and heat buildup. Galaxy A31Proper operation will help extend battery life.
A smartphone's screen is one of the largest energy consumers. When actively sharing internet via Wi-Fi, the screen can be safely turned off. Furthermore, there's an option in the hotspot settings to control screen behavior, but the physical absence of screen light already provides a significant boost to battery life.
If you use the hotspot for extended periods, it's recommended to remove the protective case if it's thick and doesn't dissipate heat well. Overheating leads to throttling (reduced processor performance), which can negatively impact network packet processing speed. Ideally, place the phone on a cool surface or near a fan.
⚠️ Caution: Extended use in access point mode at high ambient temperatures may cause the battery to swell. Monitor the case temperature and stop sharing if it gets too hot.
It's also worth keeping in mind that using a 5G network for tethering drains battery power significantly faster than 4G. If high speed isn't critical, switching to 5G mode 4G/LTE only in mobile network settings will help save up to 20-30% of energy.
Why does my phone get so hot when using Wi-Fi?
The heating is caused by the simultaneous operation of two radio modules: the receiver (from the base station) and the transmitter (the Wi-Fi antenna). The processor also operates in boost mode, routing data packets. This is normal, but requires temperature monitoring.
Is it possible to share Wi-Fi if there is no SIM card on the phone?
Yes, if the phone is connected to another Wi-Fi network. The function is called Wi-Fi Repeater. However, on some Samsung firmware versions, this function may be limited or require activation through the engineering menu.
How do I find out who is connected to my Wi-Fi?
Go to your hotspot settings and select "Connected devices." A list of all active devices is displayed. You can tap any device to block its access.
Does Wi-Fi sharing affect the speed of mobile internet on the phone itself?
Yes, it does. The bandwidth is shared between all connected clients. If the laptop starts downloading updates, page loading speeds on the smartphone itself may significantly decrease.