Owning a budget-friendly yet robust Xiaomi Redmi 3S smartphone often starts with basic questions about integrating the device into the user’s digital ecosystem. Although it came out a few years ago, it remains popular due to its stable operation and custom firmware installation. However, initial setup, especially for those who move from push-button phones or other operating systems, can be difficult.
Connection is not just an insertion SIM-maps, this is a set of actions for setting up communication, data transmission and integration with accessories. MIUI, The Android device installed on board has its own characteristics that distinguish it from stock Android. Understanding these nuances will avoid common mistakes, such as the inability to see the phone on the computer or problems with connecting to hidden networks.
We'll look at wired and wireless communication, and we'll look at diagnosing possible failures. The right initial configuration of ports and communication protocols will ensure that the device runs smoothly throughout its lifespan. Let's move from theory to practice and customize your Redmi 3S to work.
Primary activation and configuration SIM-map
Before you ask how to connect the Xiaomi Redmi 3S to the Internet or a computer, you need to provide basic cellular communication. The device is equipped with a hybrid slot, which requires careful approach to installing cards. Unlike modern models with a tray slider, it uses a classic removable battery, which hides contacts.
First, remove the back cover and remove the battery. Carefully bend the slot locks if they are present, and install SIM-After you have installed the card, insert the battery and turn the device on with the side button.
When you first start up, the system will suggest you select a language and connect to the network. If you don't have Wi-Fi yet, you can skip this step using mobile Internet. Pay attention to permission requests: MIUI can request access to contacts and messages to sync to the cloud. This is convenient for backups, but requires a Mi Account.
- 📱 Make sure the cutouts are on SIM-cards correspond to the shape of the slot, do not cut the contacts.
- 🔋 Insert the battery only after the memory card is fully installed and SIM.
- 📡 For maximum internet speed, use the slot SIM 1 for a support card 4G.
- 🔒 Don't forget to install. PIN-code if the SIM card is protected, otherwise it will not be activated.
Once the operator has successfully logged in, the indicator will appear on the screen. If this does not happen, check whether the data service is active in the operator's personal account. In some cases, you need to manually configure the APN access points, which usually come in the form of an automatic message from the operator.
Wi-Fi connection and network management
Wireless is the main channel for downloading updates, applications and multimedia. In Xiaomi Redmi 3S, the Wi-Fi module works in the 2.4 GHz and 5 GHz bands (depending on the specific revision of the board), which provides connectivity flexibility. To activate the function, lower the notification curtain from top to bottom and click on the Wi-Fi icon or go to the Settings → Wi-Fi menu.
In the list of available networks, select your access point. If the network is hidden, click Add Network at the bottom of the list and enter the name (SSID) manually. Special attention should be paid to the type of encryption: modern routers use WPA2-PSK or WPA3, and choosing the wrong option will lead to an error of connection. Enter the password, observing the register of letters, and click "Connect".
The MIUI-based Android system allows you to save network profiles, which means that when you revisit places with previously used Wi-Fi (cafe, office, friends' house), the phone will connect automatically. However, if you change your password on the router, you need to select the option "Forget the network" on the phone and enter new data, otherwise the device will try to connect to the old settings.
⚠️ Note: When connecting to public free Wi-Fi networks, it is not recommended to enter bank card details or passwords from important services. VPN-a connection to encrypt traffic, as administrators of such networks can intercept unencrypted data.
For more fine-tuning, you can go to the advanced Wi-Fi settings. Change is available here. MAC-Addresses (useful to bypass access restrictions on some networks), proxy server and static configuration IP. These features are rarely required by the average user, but can be critical in corporate networks with tight security policies.
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If your phone is connected to Wi-Fi for a long time or constantly loses communication, try changing the router’s broadcast channel to 1, 6 or 11 to avoid interference from neighboring devices.
Communication with the computer: USB-modes and drivers
One of the most common requests from owners is how to connect the Xiaomi Redmi 3S to a computer to transfer files. When you physically connect with a Micro-USB cable, the phone defaults to Charge Only mode. This is done for security reasons, so that attackers can't access data when they connect to public charging stations.
After connecting the cable, unlock the smartphone screen. a notification will appear on top "Charge through" USB-Click on it to open the mode selection menu USB. Here you will see several options: "File transfer (MTP)", "Transmission of photographs (PTP)" and "Charge Only." For full access to the file system, select MTP.
If the drivers are not installed automatically (which is often the case on older versions of Windows, such as XP or 7), you will need to install ADB Driver or universal Google USB drivers. On Windows 10 and 11, the system usually finds the necessary components through the update center.
The quality of the cable is important. Cheap cables that come with inexpensive gadgets or bought in transitions often have only two power veins and no data lines. If the computer does not respond to the connection even after a mode change, try replacing the cable with a known serviceable one that supports data transfer.
- 💻 Regime. MTP Allows you to see all the folders of your phone in my computer".
- 📸 Regime. PTP It is designed to work with cameras and may be required for specific software.
- 🔌 Use an original or certified cable no longer than 1 meter in length for a stable connection.
- ⚙️ To access system folders may require the inclusion of debugging by USB.
Bluetooth setting and device pairing
A wireless headset, fitness bracelet or car stereo all require Bluetooth activation. In Redmi 3S, Bluetooth 4.2 provides energy-saving connectivity. To get started, go to Settings → Bluetooth and turn on the switch. The phone will start scanning available devices within range.
To connect a new device, put it in pairing mode (usually with a long press of the power button). When the gadget name appears in the list on the smartphone screen, click on it. The system can request a code confirmation or simply notify you of a successful connection. Car systems often require you to enter a standard pin code, such as 0000 or 1234.
In Bluetooth settings, you can configure access rights for each paired device in detail, for example, in a car system, you can only allow access to contacts and calls, denying access to messages, which increases data privacy when using someone else's or public devices.
☑️ Checking Bluetooth connection
While the speed of this method is slow, it remains useful for sending small documents or contacts quickly to devices that do not have the Internet. MIUI has a built-in tool called “Mi Drop” (now known as ShareMe) that uses a bundle of Wi-Fi and Bluetooth to transfer files much faster between Xiaomi devices and beyond.
Using USB OTG to connect peripherals
A unique feature of budget smartphones of the time, including the Redmi 3S, Support for technology USB On-The-Go. This allows you to connect external devices to your phone: flash drives, keyboards, mice and even card readers (OTG-cable) from the Micro-USB connector to the standard USB Type-A.
The connection process is very simple: insert the adapter into the charging port of the phone, and then connect the peripherals. The system automatically detects the new device. In the case of a flash drive, the corresponding icon will appear in the notification curtain, and a new section, usually called the Explorer, will appear in the file manager (Conductor). usb_storage. You can copy, move and open files directly.
When you plug in a keyboard or a mouse, you'll see a cursor or text input field on the screen, which makes your smartphone a minicomputer, which is especially useful when typing large amounts of text or working with documents. However, the Redmi 3S has a limited recoil current on the USB port, so connecting power-hungry devices like external hard drives without power may not work or quickly discharge the phone.
| Type of device | Support for OTG | Food is required. | Note |
|---|---|---|---|
| USB flash drive | ✅ Yes. | ❌ No. | FAT32 format is readable by default |
| Computer mouse | ✅ Yes. | ❌ No. | It works immediately after connection. |
| External HDD (2.5) | ⚠️ Partially. | ✅ Often, | Maybe you're missing the current from the phone. |
| USB keyboard | ✅ Yes. | ❌ No. | Useful for typing. |
If the connected device is not identified, check the settings in the Settings menu → Additional features → USB OTG (some versions of MIUI need to enable this feature manually). Also make sure that the USB drive file system is compatible: native Android reads FAT32 and exFAT perfectly, but third-party driver apps may be required to work with NTFS.
Solving Connection Problems and Diagnostics
Even with the right setup, there can be failures.If Xiaomi Redmi 3S It does not connect to Wi-Fi, writes "Getting" IP-Address..." and then breaks the connection, try changing the settings. DNS. In Wi-Fi settings, select your network, click "Change" and in the settings IP switch off DHCP Static. In the field. DNS 1 enter 8.8.8.8 (Google) and in DNS 2 — 1.1.1.1 (Cloudflare).
Problems with USB-connection is often solved by clearing the cache of the media storage service. → Advanced settings → Confidentiality → Access to data → System applications, find Media Storage and clear the data, and then you need to reboot the device, which will reset the indexing of files and can eliminate the errors in the display of the phone on the PC.
Secret code for checking hardware modules
In the event of a total lack of communication (no network, no Wi-Fi, no Bluetooth) after falls or moisture, there is a possibility of a hardware malfunction of the antenna module or plume. Software methods are powerless here, and it is also worth checking whether the phone is locked by the operator (SIM-lock) if it was purchased abroad.
⚠️ If the phone is no longer visible SIM-map after firmware update, don't rush to bring it to the service. SIM-cards with a pin and alcohol, and also check if the card is tightly pressed in the slot.
To diagnose network problems, you can use the built-in Task Manager tool or third-party snails like Ping & DNS. They will help determine where the connection is broken: at the level of a physical signal, router or provider. Regular reboot of the router and phone is also an effective method of preventing network modules from hanging.