Modern smartphones have long ceased to be just devices for making calls, turning into powerful tools for organizing communications anywhere in the world. Model Samsung Galaxy A31Despite its age, the device remains popular thanks to its reliable hardware and high-quality display. One of the most popular features among users is the ability to turn the device into a full-fledged router.
Situations where you need to urgently connect a laptop or tablet to the network occur everywhere: in a cafe, in a park, or when your home provider suddenly goes out. Mobile hotspot Allows you to instantly create secure coverage using your SIM card's resources. This solution is often faster and more stable than searching for public networks.
However, not everyone knows about the intricacies of setting up this function on the One UI shell installed on Samsung A31Incorrect configuration can lead to rapid battery drain or problems connecting other devices. In this article, we'll cover in detail how to properly activate and configure internet sharing, avoiding common mistakes.
Before setting up, make sure your device has mobile data enabled. Without this basic requirement, creating a hotspot is impossible, as the phone will have nothing to broadcast to the outside world. Check your phone's balance and ensure you have a stable cellular signal.
Basic hotspot activation via the notification shade
The fastest way to activate tethering is to use the quick access panel. It takes just a few seconds and doesn't require diving deep into the settings menu. This method is ideal for situations when you need internet access right away.
Swipe down from the top of the screen to expand the drawer. If you don't see the icon you need, swipe down again to expand the drawer. Look for the icon with the name Access point and modem or simply Access point.
⚠️ Note: If the icon is grayed out or missing, check if Airplane Mode is enabled. It blocks all wireless connections, including Wi-Fi and cellular.
Tap the icon to activate the feature. Upon first launch, the system may ask you to confirm whether to enable mobile data if it was previously disabled. Once activated, the icon will turn color, and an indicator of the number of connected devices will appear in the status bar.
For those accustomed to the classic controls, there's an alternative path through the main menu. It allows you to not only enable the feature but also check your security settings right away. Go to Settings and find the section Connections.
Inside this menu, select the item Mobile hotspot and modemHere you'll see a toggle to activate the feature and access advanced settings. This is where we recommend performing initial configuration before use.
Configuring security settings and network name
Factory settings of the access point on Samsung A31 Often contain a standard network name that's easily identified by attackers. Changing these settings is the first step to ensuring the security of your data. We strongly recommend changing the network name (SSID) to something unique.
In the access point menu, click on the three dots in the corner or the button TuneIn the window that opens, you can change the network name. Use a combination of letters and numbers to prevent your hotspot from getting lost in the list of neighboring networks named "Android" or "Samsung."
Pay special attention to the password field. By default, the system generates a complex key, but users often change it to simple combinations like "12345678." This is a critical error. Use WPA2-Personal or WPA3 to encrypt traffic.
The password must contain at least 8 characters, including uppercase letters and special characters. This will protect you from unauthorized access and traffic theft. Remember that all activity on your network will be visible to the smartphone owner.
An additional security measure is hiding the network name. If you enable this option, your phone will not broadcast the SSID. Only those who know the exact network name and enter it manually will be able to connect.
Advanced settings and management of connected devices
One UI provides flexible tools for data usage control. You can limit the number of connected devices or set the hotspot duration. This helps conserve battery life and prevents overheating.
In the settings section, find the item Permitted devicesHere you can create a whitelist of devices that are allowed to connect. All other devices, even with the password, will not be able to access the network.
A timer function is also available. You can set the hotspot to automatically turn off if no one connects to it for a certain period of time (for example, 5 or 10 minutes). This is a useful option for forgetful users.
To monitor current connections, the access point menu displays a list of active clients. Here you can see the device's name and the amount of data consumed. You can block a suspicious device at any time by clicking the toggle next to its name.
It's important to be aware of your mobile operator's data limits. Many plans have data tethering restrictions or require a separate fee. Exceeding these limits can result in reduced speeds or blocked access.
What is an APN and do I need to change it?
APN (Access Point Name) is your carrier's network access settings. They are usually loaded automatically when you insert your SIM card. You only need to change them in rare cases where the access point isn't working, but the internet works fine in your phone's browser. Incorrect APN settings can prevent tethering entirely.
Sharing the Internet via USB and Bluetooth
Wi-Fi isn't the only way to share the internet. If your wireless module is damaged or you need maximum connection stability, use a USB modem. This method also allows you to charge your phone while sharing data.
To activate, connect your smartphone to your computer using a cable. In the menu Mobile hotspot and modem activate the item USB modemThe system will automatically install the necessary drivers if they are not available in the OS.
The advantage of a USB connection is the absence of radio interference and higher data transfer speeds. Furthermore, the laptop doesn't drain battery power searching for a Wi-Fi signal, which is important on long trips.
A Bluetooth modem is a slower but more energy-efficient option. It's suitable for transferring small amounts of data or connecting older devices that don't support modern Wi-Fi standards. Speed is limited by the Bluetooth protocol.
To enable Bluetooth modem, you must first pair the devices. Once paired, toggle the corresponding switch in the modem menu. The computer will detect the phone as a network adapter.
| Parameter | Wi-Fi hotspot | USB modem | Bluetooth modem |
|---|---|---|---|
| Speed | High (up to 150 Mbps) | Maximum (depending on cable) | Low (up to 2-3 Mbps) |
| Energy consumption | High | Low (charging) | Average |
| Number of devices | Up to 10 | 1 | 1 |
| Stability | Depends on interference | High | Average |
Optimization of operation and energy saving
Access point mode significantly loads the processor and radio module Samsung A31This leads to increased heat generation and rapid battery drain. To minimize the risk, follow the recommendations below.
Use the 2.4 GHz band instead of 5 GHz if high speed isn't required. The 2.4 GHz frequency has better penetration and uses less power, although it is more susceptible to interference from microwave ovens and neighboring routers.
Remove your phone's protective case during extended periods of internet sharing. Dense material impedes heat dissipation, which can lead to throttling (reduced performance) or even a module shutdown.
Close background apps on your phone. If your smartphone is actively downloading updates or syncing photos to the cloud, the battery drain will increase exponentially. Put your device in "Do Not Disturb" mode.
⚠️ Caution: Do not cover your phone with a blanket or pillow while it's in modem mode. Overheating the lithium-ion battery can cause swelling or shorten its lifespan.
If you're planning a long session, connect your phone to a power bank. Charging directly from the wall is also acceptable, but keep an eye on the device's temperature. Modern power controllers protect the device, but some physical heating is inevitable.
☑️ Checklist before a long distribution
Troubleshooting connection issues and errors
Sometimes users encounter a situation where the hotspot is enabled, but devices cannot connect or have no internet access. Most often, the problem lies in the APN settings or a frequency conflict.
Try changing the default protocol of the access point. In the advanced settings (Set up an access point -> Additionally) Change the range from "Auto" to a specific one (2.4 GHz or 5 GHz). Some older laptops don't detect 5 GHz networks.
Resetting network settings may help if the issue is system-wide. Go to Settings -> General settings -> Reset -> Reset network settingsThis won't delete your personal data, but it will reset your Wi-Fi passwords and Bluetooth settings.
Check your carrier's settings to see if there's a traffic limit. Some providers block TTL packets, which are common for tethering. In this case, you may need to change the TTL in the engineering menu, but this requires root access.
If the problem persists after rebooting and resetting, the Wi-Fi module may be faulty. Check that the phone itself is receiving Wi-Fi. If both reception and transmission are not working, diagnostics at a service center are required.
Frequently Asked Questions (FAQ)
Why does my laptop see the network, but it says "No Internet access"?
Most likely, your phone has a weak cellular signal or your data plan has run out. Also, check to see if the date on your phone is set in the past or future—time desynchronization blocks secure connections.
Is it possible to share Wi-Fi if the phone is connected to another Wi-Fi?
On most Samsung models running One UI, the Wi-Fi Bridge feature is limited or unavailable without third-party software. Typically, the phone switches to the mobile network when the hotspot is enabled.
How many devices can be connected to Samsung A31 at the same time?
Technically, the device supports up to 10 simultaneous connections. However, if more than 3-4 devices are connected, the internet speed on each device will noticeably decrease, and the phone will become very hot.
Does the operator charge an additional fee for internet distribution?
It depends on your data plan. Many modern plans include unlimited data sharing, but some older or budget plans may require a separate fee or reduce speed after a certain amount.