Mobile Internet on Xiaomi Redmi 9T: full-length SIM-speed-card 4G

Smartphone Xiaomi Redmi 9T It supports modern mobile standards, but sometimes users have difficulty connecting to the Internet for the first time. SIM-maps, and with no correct settings APN Unlike flagship models, budget devices like the Redmi are limited. 9T Often, you need to manually configure network settings, especially if you’re using a virtual carrier or regional provider card.

In this article, we will analyze all possible scenarios: from basic activation of mobile data to solving common errors such as the absence of an icon. 4G You'll learn how to check your compatibility. SIM-maps 9T, Where to find the right settings APN For Russian operators, and what to do if the phone does not see the network. SIM-Cards are a function that often becomes a source of confusion.

If you have just bought Xiaomi Redmi 9T or have problems after updating the firmware, this guide will help you restore access to mobile Internet without contacting the service center. All steps are tested on the current versions of MIUI 12/13/14 and for operators Beeline, MegaFon, MTS and Tele2.

Preparation: verification SIM-Maps and compatibility with Redmi 9T

Before you set up the internet, make sure yours is yours. SIM-The card is physically compatible with Redmi. 9T. This smartphone supports this:

• 📱 Nano-SIM (only nano, micro-SIM will not work without an adapter)
• 🌐 Communication standards: 4G LTE (Bands 1/3/5/7/8/20/28/38/40/41), 3G WCDMA (Bands 1/2/4/5/8)
• 🔄 Two. SIM-cards (Dual) SIM Dual Standby, but 4G It only works on one card)

If you're using the old one SIM-card (e.g. mini-SIM) that will have to be cut or replaced in the operator's cabin. 9T It does not support eSIM, so virtual cards (like SberMobile or Tinkoff Mobile) will not work.

⚠️ Attention: If you insert SIM-card from an operator that does not support VoLTE (for example, some regional providers), calls may be interrupted when active 4G-In this case, you'll have to manually switch to the Internet. 3G network-setting.

Check if your phone recognizes your phone. SIM-map:

1. Open the Settings. → SIM-maps and mobile networks.
2. Make sure that the operator name is displayed next to the SIM number (e.g., “MTS” or “Beeline”).
3. If the IMSI code or the words “No network” are visible instead of the name, the card is inactive or blocked.

2. Basic activation of mobile Internet

If SIM-The card is recognized, but the Internet is not working, first of all turn on the transfer of mobile data:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if two of them).
3. Activate the "Mobile Data" switch.
4. Make sure that the status bar has a 4G, LTE or 3G icon.

If you have a network icon but the internet is not working, the problem is most likely with the APN settings (access points), many operators automatically send the configuration when they first connect, but sometimes you have to do this manually.

SIM card active and recognized by phone |

Mobile data included in settings |

The status bar displays the network icon (4G/3G)|

The problem is not the lack of money in the account.-->

3. Manual setting of APN for Russian operators

APN (Access Point Name) settings are the “address” that connects the phone to the operator’s Internet, and if the automatic settings are not loaded, you need to enter them manually. Below is a list of the current settings for popular Russian providers (the data is checked in 2026):

To enter these settings:

1. Open the Settings. → SIM-maps and mobile networks → [yours SIM] → Access points (APN).
2. Click Add Access Point (+ icon in upper right corner).
3. Fill in the fields as above. Leave the rest of the settings (such as Authentication Type or MMSC) unchanged.
4. Save the settings and select the profile you created in the APN list.
5. Reboot the phone.

⚠️ Note: If after manual entry APN The Internet is still down, check if the operator is blocking access to the network due to debt or tariff restrictions. For example, MegaFon can suspend the Internet at zero balance, even if you have unlimited rates.

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If you are traveling abroad, remember to turn off data roaming in your settings to avoid unexpected expenses. → SIM-maps and mobile networks → Roaming data and deactivating the switch.

Speed optimization: network selection and operating modes

Xiaomi Redmi 9T supports 4G, but by default can use 3G to save battery power.

1. Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Type of network.
2. Choose 4G (recommended) or 4G only (if available).
3. If VoLTE is available, activate it – it will improve the quality of calls without losing Internet speed.

If the network is lost or the speed drops after switching to 4G, the following reasons are possible:

• 📶 Weak signal: in some regions 4G The coating is unstable. Try to get back to the 3G.
• 🔋 Battery savings: In power saving mode, the phone may limit speed. Turn it off in Settings → Battery.
• 🔄 The Dual Conflict SIM: if you have two cards, 4G It will only work on one (usually one). SIM1).

Important: Redmi 9T with MIUI 13+ firmware has a hidden 4G Enhanced 4G option that increases speed through more aggressive network use. To enable it, type ##4636## in the Phone app, go to Phone Information and select Set preferred network type → LTE only.

5. Solving common problems

If after all the settings the Internet still does not work, use this troubleshooting instruction:

If none of these methods worked, try resetting your network settings (see table above) or upgrading Redmi 9T to the latest version. Sometimes bugs in MIUI lead to problems with your modem.

6. Features of working with two SIM-cards

Xiaomi Redmi 9T two-way SIM-maps, but with important limitations:

• 🔢 Only one. SIM may be used 4G — the second automatically switches to 3G or 2G.
• 🔄 When you're calling on one. SIM The second one becomes unavailable (Dual) SIM Dual Standby).
• 🌍 If one of them SIM used for roaming, priority 4G may shift.

To set the network priority for each SIM:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose. SIM-map for which you want to include 4G.
3. Click Network Type and install 4G.
4. For the second SIM, choose 3G or 2G (depending on your needs).

If you want 4G to work on a second SIM (like SIM2), you’ll have to switch cards physically – in Redmi 9T, the SIM1 slot always takes precedence over LTE.

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On the Redmi. 9T cannot be used simultaneously 4G both SIM-If you want high-speed Internet on the second card, move it into a slot. SIM1.

7. Speed check and network diagnostics

To make sure that the Internet is running at maximum speed, do a test:

1. Open your browser and go to the Speedtest website.
2. Press GO and wait for the results.
3. Compare the values obtained with the average for your operator (for example, for 4G in the city the norm is 20-50 Mbit / s).

If the speed is lower than expected:

• 📡 Check the signal level in Settings → SIM-maps and mobile networks → Network signal: If it's weak (1-2 divisions), try moving closer to the window or using a signal repeater.
• 🔄 Switch to another frequency. 4G (To do this, type the engineering code ##4636##, select Phone Information and experiment with Set preferred network type.
• 🛠️ Turn it off. VPN Proxies, if active, can limit speed.

Frequently asked questions