In the era of widespread use of wireless networks, the function of a portable access point on Smartphones have become an indispensable tool. It allows you to instantly distribute the Internet to a laptop, tablet or other device when a fixed Wi-Fi is not at hand.
However, when activating this function, many users forget about the basic rules cybersecurity. An open network or a weak password can be an invitation to outsiders who want to use your traffic for free. This not only slows down the connection speed, but also creates risks of personal data leakage.
Fortunately, modern versions of the operating system Android provide built-in tools for monitoring active connections. You don’t have to be an expert in network technologies to see who exactly is “sitting” on your access point right now.
Using built-in Android settings
The easiest and most accessible way to check the list of connected devices is to use the standard system interface. Starting from version Android 10, the settings interface has become much more convenient and informative.
First, you need to activate the modem mode, if it is not already enabled. Then go to menu Settings → Network and Internet → Access point and modem. This section displays the current status of your network.
Click on the item Setting up a Wi-Fi access point or just tap on the name of the active point. In the window that opens, you will see the "Connected devices" section. The names of gadgets and their MAC addresses are displayed here.
⚠️ Attention: On some smartphones from Xiaomi or Samsung this list may be hidden behind the additional "Device Management" menu. If you don't see the list right away, look for the icon with the image of two smartphones next to the enable slider.
The system automatically updates this list in real time. If you see a device that is not familiar to you, this is a good reason to change the access password immediately.
Built-in settings are the safest method, since it does not require the installation of third-party software and does not give unnecessary permissions to applications.
Analysis through third-party applications
If the standard interface of your smartphone does not show detailed information about connected clients, Specialized utilities will come to the rescue. These apps scan the local network and identify all active nodes.
One of the most popular solutions is the application Fing or WiFi Analyzer. After installing and starting the scan, the app will show a complete network map, including IP addresses and device manufacturers.
- 📱 Identification: The application often determines the device model (for example, iPhone 13 or Dell Laptop), which makes it easier to find a “stranger.”
- 🔒 Security: Some utilities offer the function of blocking unknown devices directly from the interface.
- 📊 Statistics: You can see the data transfer speed for each connected client in real time.
It is worth remembering that such applications often require geolocation access rights to work correctly. This is due to the peculiarities of the Wi-Fi module in new versions Android.
Checking through the router and provider
Sometimes a smartphone does not act as a signal source, but as a client connected to a home router, and you want to check who else is on your home network via phone. In this case, the action scenario changes.
You will need to find out the IP address of your gateway (usually it is 192.168.0.1 or 192.168.1.1). Enter this address into the address bar of any browser on your smartphone.
After entering the administrator login and password (often indicated on a sticker under the router), go to the List of clients or DHCP Clientssection. Here you will see absolutely everyone who is connected to your home network.
| Parameter | Description | Where to find |
|---|---|---|
| IP Address | Unique address of the device on the network | Main client table |
| MAC Address | Physical address of the network card | Connection details |
| Lease Time | Address lease time | DHCP settings |
| Hostname | Device name (for example, User-PC) | List of active nodes |
This method gives the most complete picture, since the router sees all traffic passing through it, regardless of the type of device connection.
What to do if the password for the router is lost?
If you have not changed the factory settings, try standard combinations: admin/admin, admin/password or admin/1234. If they do not fit, you will have to reset the router with the Reset button for 10 seconds, but this will delete all your provider settings.
Advanced methods: ADB and command line
For advanced users who are not afraid of technical terms, there is a method of checking via USB debugging. This method allows you to access system logs and ARP (Address Resolution Protocol) tables.
You need to enable the mode USB debugging in the menu For developers and connect the phone to the computer. Then, through the ADB console, you can run a command to view the routing table.
adb shell cat /proc/net/arpThe result of the command will show a list of all IP addresses known to the system and their corresponding MAC addresses. Status 0x2 usually means that the device is online and accessible.
⚠️ Warning: Using the command line requires caution. Entering commands incorrectly can lead to unstable operation of network services or temporary loss of connection.
This method is especially useful when the system's graphical interface is "buggy" and does not display the correct number of connections, and you need accurate technical information.
☑️ Preparing to work with ADB
How to protect your access point
Having detected a third-party device, it is important not only to state the fact, but also to take protective measures. The most effective way is to change the encryption type and password.
Make sure that the security protocol is selected in the access point settings WPA2 PSK or WPA3. The outdated WEP protocol can be easily cracked with special utilities in a matter of minutes.
The password must be complex: use a combination of upper and lowercase letters, numbers and special characters. Avoid obvious combinations like date of birth or sequence 12345678.
- 🔐 Change name (SSID): Don't use the standard "AndroidAP" name or phone model. Come up with a unique name that will not give away the type of your device.
- ⏱️ Timeout: Enable the function to automatically turn off the access point if no one is connected to it for 5-10 minutes.
- 👁️ Hide the network: Some smartphones allow you to hide the SSID. In this case, the network will not be visible in the general list, and to connect you will need to manually enter its name.
Regularly checking the list of connections should become a habit, especially if you often use public transport or work in crowded places.
Use password managers to generate and storing complex security keys. It is difficult for a person to remember a set of characters like “Kj7#mP9$xL”, but easy for a app.
Common problems and their solutions
Users often encounter a situation where a device is displayed in the list, but the Internet does not work on it. This may be due to the connection limit in your smartphone's settings.
By default, many phones limit the number of clients to 5 or 10 devices. If the limit is reached, new gadgets will not be able to obtain an IP address, although they will be visible in the list of requests.
Another common problem is that the client gets stuck in the list even after it is disabled. This occurs due to a delay in updating the ARP table. Usually it is enough to turn off and turn on the access point again to clear the list.
⚠️ Attention: Settings interfaces may differ depending on the manufacturer’s shell (MIUI, One UI, ColorOS). If you do not find the described item, use the search in your phone settings.
If the problem persists for a long time, try resetting the network settings. This action will delete saved Wi-Fi passwords, but often resolves software conflicts of the communication module.
Rebooting network settings is a universal solution for 80% of problems with displaying connected devices and unstable distribution speed.
Why do I see the device, but I don’t know what it is?
Often device manufacturers use standard names that do not tell the user anything (for example, "android-xyz123"). Try turning off Wi-Fi on your gadgets one by one and see which device disappears from the list.
Can the connected user see my files?
When using a standard access point, the devices are on the same subnet, but isolated from each other at the Client Isolation level. Direct access to files is impossible without vulnerabilities in the software.
How to block a specific device?
It is usually impossible to block a specific MAC address in modem mode using built-in Android tools. The only effective method is to change the access point password, which will forcefully disconnect all clients.
Does the number of connections affect the battery?
Yes, each active client increases the load on the radio module and processor, which leads to accelerated battery drain and heating of the smartphone case.
Is it safe to distribute Internet via USB?
A USB modem is the safest way, since the connection is physical and is not broadcast. In this case, it is extremely difficult to intercept data without direct access to the cable.