The modern smartphone has long ceased to be just a means of communication, having become a full-fledged control center for the digital world. The device Redmi 9T from the company Xiaomi Equipped with a powerful battery, it's ideal for use as a portable router. This hotspot function turns your 4G or 5G mobile internet into a stable Wi-Fi network for laptops, tablets, or other devices.
The process of activating modem mode on the shell MIUI It's incredibly simple and takes just a few seconds. You don't need any special apps or extensive networking knowledge. Just a few simple steps in the settings menu will allow all surrounding devices to connect to the network.
In this article, we'll cover not only basic activation but also the fine-grained security settings that will protect your traffic from prying eyes. We'll discuss how to choose the right signal frequency for maximum speed and what to do if your laptop can't detect the network you've created. Understanding these nuances will help you avoid common connection errors.
Basic hotspot activation via settings
The first and most obvious way to start internet sharing is to use the standard system menu. To do this, unlock your device's screen. Redmi 9T and find the "Settings" icon. We're interested in the section responsible for wireless connections, which is in the shell MIUI usually called Connection and sharing.
Inside this menu you will see an item Wi-Fi hotspotClicking on it will take you to the network control center. Here you'll see the current network name (SSID) and the default password. The system generates a random character set for security, but you can and should change it to something more memorable.
To enable the feature, simply move the slider at the top of the screen to the active position. Once the indicator lights up, the smartphone will begin broadcasting a signal. A notification in the notification area will confirm that the hotspot is active and ready to receive clients.
⚠️ Note: When enabling the hotspot, the system may automatically disable the Wi-Fi receiver if it was active. This is normal behavior, as the smartphone's antenna switches to transmitting rather than receiving.
After activating it on other devices, search for the new network using the name specified in the settings. After entering the password, you'll gain access to the global network via your phone's mobile data connection. Connection quality directly depends on the signal strength of the cell tower in your current location.
Configuring security settings and network name
Using factory security settings is a risk that shouldn't be ignored. The default password is often too complex to enter manually, or, conversely, too simple in earlier firmware versions. It's recommended to immediately change the network name (SSID) to a unique one to prevent neighbors or passersby from mistaking your phone for someone else's router.
In the access point menu, click on the item Setting up an access pointHere you can enter a new name using Latin letters and numbers. Avoid special characters, as some older devices may display them incorrectly or may not recognize the network at all with such characters in the name.
Pay special attention to the encryption type. From the list of available options, select WPA2-PersonalThis is the most reliable and compatible standard currently available. Older protocols like WEP have long been cracked and offer no protection, and WPA3 may not be supported by some older laptops.
Why is a strong password important?
A simple password consisting of a sequence of numbers (e.g., 12345678) can be brute-forced in a few seconds using specialized tools. Use a combination of letters and symbols at least 8 characters long.
Your password must be at least 8 characters long. Ideally, it should be a combination of uppercase and lowercase letters, numbers, and possibly one special character. Write it down in a safe place or use a password manager to help you remember complex combinations.
Choosing a Frequency Band: 2.4 GHz vs. 5 GHz
One of the key settings that affects the speed and range of the signal is the choice of frequency range. In the access point settings on Redmi 9T An option to select the AP band is often present. By default, the system may use automatic mode or the 2.4 GHz band.
Range 2.4 GHz has better penetration. The signal of this frequency bends better around walls and obstacles, providing a more stable connection over a longer distance. However, this range is heavily congested: microwaves, Bluetooth devices, and neighbors' routers operate here, which can reduce actual speed.
Range 5 GHz Offers significantly higher data transfer rates and is less susceptible to interference. However, it has a shorter range and is less effective at penetrating solid objects. If you're in the same room as your laptop, choosing 5 GHz will provide a performance boost.
For gaming and video conferencing, 5 GHz is preferable, as it offers lower ping and fewer latency spikes. For simple web browsing or messaging, the difference will be virtually unnoticeable, and you can stick with the standard 2.4 GHz for maximum compatibility.
Managing connected devices and limits
Controlling who is connected to your network is an important part of managing your personal hotspot. In the interface MIUI There's a "Connected Devices" section that displays a real-time list of all devices consuming your data. You can see the MAC address and name of each client.
The system allows you to manually limit the number of connected devices. This is a useful feature if you want to save battery life or limit the number of users. For example, by setting the limit to three devices, a fourth user will no longer be able to connect, even if they know the password.
| Parameter | Recommended value | Impact on work |
|---|---|---|
| Device limit | 3-5 pieces | Saves battery life and speed |
| Shutdown timeout | 10 minutes | Automatic shutdown when there are no clients |
| Frequency range | 5 GHz (for speed) | Reduces interference from neighbors |
| Hiding the SSID | Off | Makes it easier for new devices to find the network |
An "Access Point Timeout" feature is also available. If no one is connected to the network for a specified period of time (e.g., 10 minutes) or all clients are disconnected, the smartphone will automatically turn off the hotspot. This prevents unnecessary battery drain if you forget to turn off the feature manually.
Optimizing battery life and performance
Hotspot mode is one of the most power-hungry processes on a smartphone. The antenna operates at increased power, the processor processes network packets, and the screen may glow, consuming resources. Redmi 9T Its 6000mAh battery is better than its competitors, but it's still worth following the rules of saving.
First, try not to use your phone actively while sharing. Running heavy games or navigating apps in the background will create additional strain and heat. Second, reduce screen brightness or enable lock mode if you're not using your device right now.
If you plan on using your smartphone for a long time, for example, several hours at a time, it's best to connect it to a power source. However, keep an eye on its temperature: simultaneous charging and active data transfer can cause overheating, which will lead to throttling (reduced speed) to protect its components.
⚠️ Note: Interfaces and menu item names may vary slightly depending on the MIUI version (Global, Russia, China) and Android version. If you don't see the item, check for system updates.
Close background apps that actively use the network, such as cloud photo syncing or app updates from the Play Store. This will free up bandwidth for the primary client device and reduce the load on the smartphone's modem.
Solution: If the Internet doesn't work
It happens that the device is connected to a Wi-Fi network Redmi 9T, but the internet isn't working. First, check if your phone has a mobile connection. Try opening any page in your smartphone's browser without using Wi-Fi.
A common problem is incorrectly set date and time. If the system time is out of sync, website security certificates fail verification, and the browser blocks the connection. Make sure this is correct in your settings. Date and time Automatic synchronization is enabled.
Another cause is a full DNS cache or IP address conflict. Try forgetting the network on the client device (laptop) and reconnecting. On the phone itself, you can temporarily enable airplane mode for 10 seconds and then disable it to reboot the network module.
☑️ Internet Problem Diagnosis
In some cases, telecom operators block data sharing for certain plans. If all settings are correct but the internet still isn't working, contact your operator's support team to clarify the terms of your plan.
Frequently Asked Questions (FAQ)
Does the Redmi 9T get very hot when using Wi-Fi?
When actively transferring large amounts of data, the device's body may become warm, especially around the camera. This is normal for modern smartphones. However, if the temperature becomes excessive, the system will automatically limit the speed or disable the access point for protection.
Is it possible to share Wi-Fi if the phone is connected to a Wi-Fi router?
Using standard Android and MIUI features, you can't simultaneously receive and broadcast Wi-Fi. The antenna is either transmitting or receiving. However, there are third-party apps that require root access that can bypass this limitation, but their use is not recommended for regular users.
Why does my laptop see the network, but it says "No Internet access"?
The problem is most likely with your mobile carrier. Check your balance, plan data, and coverage area. Also, make sure that pages open normally on your phone's mobile data plan.
How to increase the range of an access point?
It's physically impossible to increase a smartphone's antenna power using software without risking damage. The best way to improve reception is to place the phone elevated, near a window or in the center of the room, and away from metal objects and microwaves.