Modern smartphones such as Redmi 9A, are becoming the primary means of accessing the global network for millions of users. Initial device setup is impossible without an internet connection, making wireless module configuration a priority. Synchronization with the router in the shell MIUI It is implemented as intuitively as possible, but there are some nuances that every owner should be aware of.
Stability of work wireless connection Directly impacts content download speed and video call quality. In this article, we'll cover not only the standard steps but also hidden settings that can improve signal quality. You'll learn how to quickly switch between networks and troubleshoot common connection issues.
Let's start with the basic steps that apply to most use cases. Regardless of the firmware version, the interface logic remains similar. Wireless networks are managed through a single settings center, which is always accessible.
Basic wireless setup
To get started, you need to activate the corresponding module in the system. On the side of the case Redmi 9A Or, at the top of the screen, there's a quick access control. Tapping the "Wi-Fi" icon puts the device into search mode for available hotspots.
If you prefer to work through the settings menu, follow this path: Settings → Wi-FiA list of all detected routers within range is displayed here. Select the desired network from the list by clicking on its name. The system will automatically prompt you to enter a security key if the network is password-protected.
Entering the password requires attention to case, as the system distinguishes between uppercase and lowercase letters. After entering the information, click the "Connect" button and wait until the "Connected" status appears under the network name. At this point, encryption keys are exchanged between the phone and the router.
⚠️ Warning: When connecting to open public networks, it is not recommended to enter bank card details or passwords for important accounts, as your traffic may be intercepted.
Advanced Network Settings and Static IP
In some cases, a standard connection is not enough, especially if the router is configured to filter devices by MAC address Or, you may need to manually specify DNS servers. To access these settings, go to the menu for the selected network and find "IP Settings." By default, it's set to "DHCP," which means the address will be obtained automatically.
Switching to a static IP allows you to fix the device's address on the local network. This is useful for setting up local file sharing or port forwarding. You'll need to manually enter the IP address, gateway (usually the router's address), and network prefix length.
You can also enter DNS server addresses here, for example, from Google (8.8.8.8) or Cloudflare (1.1.1.1). This often helps speed up page response times if your ISP has slow nameservers. Changes take effect immediately after saving the configuration.
Why do you need a static IP?
Address fixation allows the router to always assign the same IP address to the phone, which is critical for the operation of some smart home devices and printers that need to "see" the phone using a fixed address.
Wi-Fi Assistant and Smart Switching
shell MIUI The Wi-Fi Assistant is equipped with an intelligent connection management system called Wi-Fi Assistant. This tool analyzes signal quality and internet speed, offering to switch to mobile data if the wireless network is unstable. This option is usually found in the upper right corner of the Wi-Fi settings screen or in the "Advanced" menu.
The Wi-Fi Assistant feature can automatically connect your device to open access points that the system deems safe. However, be careful: automatically connecting to other routers can lead to unexpected data usage or a security risk. It's best to keep this option under control.
Another useful feature is a poor connection notification. If the signal becomes too weak, the phone vibrates or displays an exclamation point icon. This is a signal to move closer to the router or check its functionality.
Dual-band networks: 2.4 GHz and 5 GHz
Modern routers often broadcast two networks simultaneously: at 2.4 GHz and 5 GHz. Smartphone Redmi 9A It supports both bands, but their intended uses differ. The 2.4 GHz frequency provides greater coverage and penetrates walls better, but it's slower, and the airwaves are often clogged with neighboring routers.
The 5 GHz band offers significantly higher data transfer rates and less interference, but its range is significantly shorter. If you're in the same room as your router, it's preferable to choose a network with "5G" in its name. This will ensure maximum speeds for downloading large files and streaming 4K video.
Sometimes a phone may "catch" on a weak 2.4 GHz signal, ignoring the faster 5 GHz. In such cases, you can temporarily disable the unwanted frequency in the router settings or simply forget the network with the worst signal on your phone to force it to select the better option.
| Parameter | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Speed | Up to 150-300 Mbps | Up to 400-800+ Mbps |
| Range | High (up to 30-40 m) | Medium (up to 15-20 m) |
| Permeability of walls | Good | Bad |
| Workload | High (many neighbors) | Low |
Resetting network settings and troubleshooting errors
If your phone detects the network but won't connect, or if it's connected but there's no internet, resetting your network settings will help. This won't delete your personal files, photos, or contacts, but it will clear all saved Wi-Fi passwords and Bluetooth device settings. This procedure is performed through the menu: Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and Bluetooth.
A common cause of problems is an IP address conflict or a malfunction in the Android network stack. Restarting the device resolves the frozen module issue in 90% of cases. If this doesn't help, try deleting the problematic network (click the gear icon next to its name and select "Delete"), then re-enter the password.
It's also worth checking that Airplane Mode isn't enabled. Sometimes the system doesn't exit this mode correctly, leaving the Wi-Fi module blocked. Re-enabling and disabling Airplane Mode resets all the phone's radios.
⚠️ Note: After resetting your network settings, you will need to re-enter passwords for all your home and work Wi-Fi networks, as they will be deleted from your phone's memory.
☑️ Diagnostic checklist
Security and privacy when connecting
When connecting to a new network, Android 10 and above (which is what Android is based on) Redmi 9A) uses a random MAC address by default. This means that your phone appears to the router as a new device each time, which increases anonymity, but can create problems if the router has strict MAC address filtering configured.
If you're connecting to a home network and want to ensure your phone is consistently identified, you can change the privacy setting. In the specific network's menu, find "Privacy" and switch from "Random MAC Address" to "Device MAC Address." This will make the identifier persistent.
For corporate networks or networks with a login portal (where you need to enter a phone number or accept terms and conditions in a browser), it's important that the phone's date and time are set correctly. An incorrect time can block access to login pages due to SSL certificate issues.
Why doesn't my phone see the 5 GHz network?
You're likely too far from the router, or the 5 GHz channel in your router settings is set to a value unsupported in your region. Try moving closer to the signal source or changing the channel in your router settings to 36, 40, 44, or 48.
How to transfer a Wi-Fi password to another Xiaomi phone?
Bluetooth must be enabled on both phones and the screen unlocked. On the phone that's already connected, tap the network name in the Wi-Fi list and select "Share" or scan the QR code with the other phone's camera. You won't need to enter a password.
What should I do if it says "Saved, protection disabled"?
This means the phone has successfully connected to the router, but the router is not providing internet access. Check your ISP balance, reboot the router, or call your ISP's technical support. The problem isn't with the phone.