Modern smartphones based on the Android operating system offer many convenient features that greatly simplify the everyday use of the gadget. One of the most popular features is fast connection to a wireless network without the need to manually enter a complex password. This technology has become a de facto standard since Android 10, although many manufacturers have implemented it earlier in their shells.
You no longer need to dictate a combination of letters and numbers to a friend or look for a sticker on the router. You just need to show the screen of your device. The process generating and scanning a QR code takes a matter of seconds and works stably on the vast majority of current models. In this article we will look in detail at how to transfer access to the Internet from one phone to another using the built-in tools of the system.
Sometimes users are faced with a situation where the standard interface seems unobvious, or the function is hidden in the depths of the menu for some reason. Understanding the principles of operation WPA security protocol and the mechanisms for encrypting data in a QR code will help you confidently navigate the settings of any device. Let's look at all the nuances of this useful option.
Technology for transmitting data via pattern lock
The method is based on a standard Quick Response Code, which was originally used in logistics, but has now become an integral part of mobile operating systems. When you create a Wi-Fi code, your phone encodes in a graphic not only the name of the network (SSID), but also the type of encryption, as well as the password itself. The receiving device reads this data and automatically initiates the connection.
This solution eliminates the human factor: you cannot make a mistake in the case of a letter or confuse the number "0" with the letter "O". Automation of the process guarantees that the connection will be successful on the first try if the network signal is sufficiently stable. The technology works locally and does not require access to the Internet for the process of transferring the access key.
It is worth noting that the data format in the code is strictly regulated. The smartphone generates a string of a certain type, which the camera decoder recognizes as a command to connect to the network. This makes the method universal: you can connect to the network even if the receiving device has a different version of Android or custom firmware, as long as it supports the scanning standard.
⚠️ Attention: The QR code contains the password for your network in clear text (after decoding). Do not post screenshots of this code on social networks or public chats, as anyone can access your home Internet.
If you often host guests, print out the QR code of your home network and hang it on the wall in the living room. This will save you from having to dictate your password every time.
How to generate a QR code on a distribution device
First, you will need a smartphone that is already connected to the desired wireless network. It is this device that will act as a “source” of data. The process may vary slightly depending on the manufacturer (Samsung, Xiaomi, Pixel), but the general logic remains the same for the entire ecosystem.
Go to settings and find the section responsible for connections. It is usually called "Wi-Fi" or "Wireless Networks". Here you will see a list of available access points. Find the one you are connected to and click on it. In some shells you need to click on the gear icon next to the network name, in others you just tap on the network name.
After opening the network card, you will see a button Share or a QR code icon. Clicking this button will generate a graphic image on the screen. The system may require you to verify your identity through your fingerprint, Face ID, or screen unlock PIN. This is a security measure so that strangers cannot find out the password simply by taking your unlocked phone.
- 📱 Open
Settingsand go to the sectionWi-Fi. - 🔗 Click on the active one network or the gear icon next to it.
- 👁️ Select option
ShareorQR codeand authenticate. - 📸 Show the resulting code on the screen to the receiving device.
The process of scanning and connecting on the second phone
Now let's move on to the device that needs to be given access to the Internet. On most modern smartphones, the scanning function is built directly into the Camera application. You don't need to install third-party software, which reduces the risk of picking up malware.
Launch the camera and point the lens at the QR code displayed on the first phone. The distance should be just right: not too close that the camera can't focus, and not too far away. Typically, the system will automatically recognize the code and display a pop-up notification at the top of the screen or right in the center.
After the notification appears click on it. The system will offer to connect to the network with the specified name. Confirm the action and the phone will automatically enter the password and establish a connection. The connection status will change to “Connected” and you will be able to use the Internet.
If the standard camera does not respond to the code, check the application settings. In some models (Huawei, Honor), the QR scanning function must be activated manually in the camera menu or using a separate "Scanner" application. You can also use the Google Lens service, which is often integrated into the search bar or gallery.
☑️ Checklist for successful connection
Features of interfaces from different manufacturers
Despite the common Android base, the visual design and arrangement of elements can vary greatly. Manufacturers strive to make the interface unique, which sometimes makes it difficult to find the right function. Below is a table with guidelines for popular brands.
| Brand / Shell | Path to function | Features |
|---|---|---|
| Samsung (One UI) | Settings → Connections → Wi-Fi → Gear → QR code | The code is generated immediately, scanning through the camera or side panel |
| Xiaomi (MIUI/HyperOS) | Settings → Wi-Fi → Click on network → QR code | There is a separate scanner in the notification shade |
| Google Pixel (Stock Android) | Settings → Network and Internet → Wi-Fi → Gear → Share | Clean interface, biometrics required |
| Realme / OPPO | Settings → Wi-Fi → Click on network → Share password | Often you need to enter a password from lock screen |
Owners of devices from Samsung It is worth paying attention to the "Sidebar" function. If you add the QR Code Scanner tool there, you can read codes directly on top of other applications without minimizing them. This is convenient if you are chatting in messenger and a friend has sent a code with a picture.
On devices Xiaomi there is often a situation where when you click on the “Share” button, the code does not appear immediately, but is prompted to first save it to the gallery. This is not a bug, but an implementation feature. You can save the image and send it via messenger if the interlocutor is far away.
⚠️ Attention: Interfaces are updated with each firmware version. If you do not find the described item, use the search in the settings by entering the request “QR” or “Share”.
Solving problems when scanning and connecting
Sometimes the process does not go as smoothly as described in the instructions. The camera may not see the code, or the connection may be lost immediately after installation. Most often, the problem lies in the screen brightness settings or dirty optics.
Increase screen brightness on the phone that shows the code to the maximum value. A dim screen may make the contrast insufficient for the matrix to be correctly read by the camera of another device. Also wipe the camera lens of the receiving phone with a soft cloth.
If the code is recognized, but the connection does not occur, check the frequency range. Some older devices only support 2.4 GHz, while modern routers can only broadcast the network in the 5 GHz band. Make sure that the receiving phone is compatible with the network standard.
What to do if the camera does not see the code?
Try to take a screenshot of the code on the first phone and send it to the second one via messenger. Then open the picture on the second phone and use Screen Search or Google Lens to scan the image from the gallery.
In rare cases, rebooting the network module helps. Turn Airplane mode on and off on both devices. This will reset the network adapters and may eliminate a software glitch that is preventing the connection.
Security and hidden networks
The use of QR codes is safe in terms of data transfer, since the connection is established directly between the phone and the router, bypassing intermediate servers. However, as mentioned earlier, the code itself is the carrier of the password. Store screenshots with codes in protected folders or delete them immediately after use.
It is worth mentioning separately hidden networks. If your access point is configured so that it does not broadcast its name (SSID), it may not be possible to generate a standard QR code for it through the settings menu. In this case, the system simply will not show the “Share” button, since for it the network looks like “different” or inactive.
To connect to a hidden network through code, you will need to manually create a Wi-Fi format string and generate the code through a third-party service or generator application. The format of the line is as follows:
WIFI:T:WPA;S:Network_Name;P:Password;H:false;;Here T indicates the encryption type, S is the network name (SSID), a P — password. If the network is hidden, the parameter H must be equal to true. By inserting this line into the QR code generator, you will get an image that will allow you to connect even to an invisible network.
Standard Android tools do not allow you to create a QR code for a hidden network directly from the Wi-Fi menu. To do this, you need to use third-party generators or manually set the network parameters on the device.
Frequently asked questions (FAQ)
Is it possible to connect an iPhone to Wi-Fi via a QR code from Android?
Yes, it is possible. iOS supports the standard for scanning Wi-Fi QR codes starting with iOS 11. Simply point your iPhone camera at the code generated on your Android smartphone and confirm the connection in the pop-up window.
What to do if the QR code cannot be read due to glare?
Try changing the angle of the phones relative to each other to remove the reflection of light. You can also reduce the screen brightness for a split second at the time of focusing if the camera’s automation cannot cope with overexposure, and then increase it again.
Does the Wi-Fi QR code expire?
No, the code is valid indefinitely until the password for the network or its name changes. You can save the code image in the gallery and reuse it at any time.
Is it possible to change the password in an already generated QR code?
No, the information in the code is statically encrypted. If you changed the password in the router settings, the old QR code will no longer work. You will need to generate a new code through the Wi-Fi settings menu.
Does this method work if there is no Internet on the phone?
Internet is not needed to generate and scan the code. The process occurs locally. However, if the Wi-Fi module is disabled on the receiving phone or it is faulty, the connection, of course, will not take place.