In today's world, a smartphone has long ceased to be just a device for making calls, becoming a fully-fledged mobile router capable of providing internet access to a laptop, tablet, or other gadget anywhere. This issue is especially pressing for owners of budget-friendly yet powerful models, such as Xiaomi Redmi 9When fixed Wi-Fi is unavailable and you need to work urgently, the Internet sharing feature is built into the shell. MIUI by default, but many users are unaware of hidden configuration options that allow them to not only distribute Wi-Fi but also secure the connection.
The process of activating the modem mode on devices Xiaomi It's as simplified as possible for the average user, but requires attention to detail if you want to avoid rapid battery drain or data leaks. Unlike standard procedures, it includes nuances related to frequency range and managing connected clients. Proper setup will allow you to use your smartphone as a full-fledged access point without the risk of overheating or signal loss.
In this article, we'll cover all the steps for creating an access point in detail, from basic setup to advanced security settings. You'll learn how to change the network name, set a secure password, and select the optimal frequency band for stable operation. We'll also cover energy saving issues, as Wi-Fi distribution is one of the most energy-intensive processes for lithium-polymer batteries.
Basic hotspot activation via the notification shade
The fastest way to start sharing your internet is to use the quick access panel at the top of the screen. To do this, swipe down from the top of the display to open the notification shade. In the array of icons, look for the icon, which typically looks like two linked rings or an antenna, and is labeled "Hot Spot." Tapping it will instantly activate the feature if it's already set up.
If you don't see the icon you need in the first row, try swiping left or tapping the edit button (usually a pencil or three dots) to add the "Hot Spot" widget to a prominent location. Once activated, the icon will highlight and a corresponding indicator will appear in the status bar. Visual confirmation Enabling it is critically important, as sometimes the system may not launch the module due to lack of mobile traffic.
⚠️ Attention: Make sure mobile data is enabled on your Redmi 9. If mobile data is disabled, the hotspot will work, but it won't be able to transmit data to other devices.
It's worth noting that this method is good for emergency situations, such as quickly transferring a file or checking email on your tablet. However, for continuous use, it's better to delve into the deeper settings menu, where more flexible network management options are available. MIUI Allows you to customize the behavior of the Wi-Fi module, which is not possible through the quick panel.
Configuring network settings: name, password, and security
To ensure your network is not only accessible but also protected from unauthorized connections, you need to manually configure your access point settings. Go to the menu Settings, select "Access point and tethering," and then tap "Set up a hotspot." This is where you'll find key configuration your virtual router.
The first thing you'll notice is the SSID field, which by default contains the model name of your phone, for example, Redmi 9_4A2BIt's recommended to change this name to something more recognizable, especially if you're in a crowded area. The password should also be changed to a complex combination of letters and numbers to prevent unauthorized access.
- 🔒 Encryption: Always choose the WPA2 PSK protocol, as it provides the best balance between compatibility and data security.
- 📶 Range: The default is often 2.4 GHz, which provides a wide range but lower speed.
- 🚀 5 GHz frequency: If your devices support this standard, switching will provide a significant speed increase, but will reduce the signal range.
Pay special attention to hiding the SSID. If you enable this feature, your network won't appear in the list of available connections on other devices. To connect, you'll have to manually enter the network name and password. This adds an extra layer of security. security, although it does add some inconvenience during the first pairing.
☑️ Network security check
Choosing a Frequency Band: 2.4 GHz vs. 5 GHz
One of the most important settings in the access point menu is selecting the frequency band. The Redmi 9 supports both standards, and the right choice depends on your current conditions and the devices connected. The 2.4 GHz band has a longer range and penetrates walls better, making it ideal for sharing internet in a large apartment or office.
However, this band is often congested with signals from nearby routers, microwave ovens, and Bluetooth devices, which can lead to speed drops. Switching to 5 GHz avoids interference and ensures high data transfer rates, which are critical for watching high-definition video or making video calls. But keep in mind that range 5 GHz has significantly less.
| Characteristic | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Transfer speed | Up to 150 Mbps | Up to 866 Mbps |
| Signal range | High (up to 50 m) | Medium (up to 20 m) |
| Penetration ability | Good | Low |
| Interference level | High | Short |
If you're unsure which band to choose, try switching between them and running a speed test on the connected device. In urban areas, 5 GHz often performs better, while in the countryside or outdoors, where coverage is crucial, 2.4 GHz performs better. Xiaomi allows you to change this parameter on the fly without rebooting the access point.
Why can't my laptop see the 5 GHz network?
Some older network adapters in laptops and tablets don't physically support the 802.11ac/n standard in the 5 GHz band. If you've switched the frequency and your device can no longer find the network, reset the setting to 2.4 GHz or "Auto."
Managing connected devices and traffic limits
You can control who's connected to your network through the "Connected Devices" menu. It displays a list of all devices, their MAC addresses, and the amount of traffic they've consumed. This is a useful feature for identifying "unwanted guests" who might have guessed your password. You can block access to a specific device at any time by simply clicking on it and selecting the appropriate action.
The system also allows you to set a data limit. This prevents your mobile data plan from being unexpectedly depleted if someone starts downloading large files. You can set a data limit (for example, 1 GB or 5 GB), after which Wi-Fi hotspot access will automatically be disabled. Automatic shutdown will save you from additional operator costs.
A timer feature is also available. You can configure the Redmi 9 to turn off the hotspot automatically if no one connects for a certain amount of time (e.g., 1 or 10 minutes). This helps conserve battery life when you forget to turn off tethering manually.
⚠️ Attention: Traffic limits apply only to the data passing through the access point. Your carrier may calculate your traffic differently, so always check your mobile operator account to accurately monitor your remaining megabytes.
Connection problems and solutions
Despite the stability of work Android And MIUISometimes users encounter problems with other devices being unable to connect to the network they've created, or with the connection still not working. Most often, the problem lies in the incorrect frequency range or network settings. First, try turning the mobile data connection off and on again on the Redmi 9 itself.
If this doesn't help, reset your network settings. Go to Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and BluetoothThis operation won't delete your personal data, but it will reset your network settings to factory defaults, which often resolves IP address conflicts. It's also worth checking that "Data Saver" mode isn't enabled in your hotspot settings, which can limit background activity.
- 📱 Reboot: A simple reboot of the smartphone often solves 90% of software glitches in the Wi-Fi module.
- 🔄 Forget network: On the device you are connecting to, select your network and tap Forget, then try connecting again.
- 🛡️ Antivirus: Third-party security applications may be blocking incoming connections, try disabling them temporarily.
In rare cases, the problem may be with your mobile operator. Some plans don't include tethering or require a separate payment. If you see a connection but the pages aren't loading, check your plan's terms. Blocking by the provider — a common reason for the Internet not working when the access point is active.
Energy saving and impact on battery
Sharing Wi-Fi is one of the most resource-intensive processes for a smartphone. The wireless module operates at high frequencies, constantly exchanging data with connected clients, which leads to significant heat buildup and rapid battery drain. The Redmi 9 has a 5020 mAh battery, which is a good figure, but even this may not be enough for a long session of active sharing.
To minimize the impact, avoid using your phone in hotspot mode while charging if it's lying on a soft surface (like a sofa or bed), as this can cause overheating. Instead, place the device on a hard surface or use a fan for cooling. It's also recommended to reduce screen brightness to a minimum or turn off the display completely, as it also consumes power.
You can find a "Power Saver" profile in the battery settings, but its effectiveness is questionable when actively distributing Wi-Fi, as the system prioritizes the network module. Limiting the number of connected devices would be more effective. The more devices connected to your access point, the higher the load on the processor and radio module. Optimal quantity clients for stable operation - no more than 3-4 devices.
Is it possible to share Wi-Fi if your phone doesn't have a SIM card?
No, a SIM card with an active data plan is required to share mobile data. However, if your Redmi 9 is connected to another Wi-Fi network, you can rebroadcast the signal, but MIUI functionality typically only allows mobile data (3G/4G) to be used as a data source. Rebroadcasting Wi-Fi to Wi-Fi requires special apps or root access.
Why does the access point turn off by itself after 10 minutes?
This is a standard power-saving feature in MIUI. If no device is connected to the hotspot for a set period of time (10 minutes by default), the system turns off the module to save battery. This setting can be changed or disabled in "Hot Spot Settings" -> "Turn off hotspot."
Does Wi-Fi sharing affect the speed of mobile internet on the phone itself?
Yes, it does. The connection is shared between all connected devices. If the laptop starts downloading a large file, the speed on the Redmi 9 itself will also drop, as the 4G/LTE bandwidth is limited and divided between all active data streams.
How do I find out who is connected to my Wi-Fi?
Go to the hotspot settings and select "Connected devices." A list of all devices with their names and MAC addresses will be displayed. You can click on any device to block its access or view connection details.