Step-by-step setting up MTS mobile Internet on Xiaomi smartphones: from APN to troubleshooting

Mobile Internet from MTS on Xiaomi smartphones (including the Redmi line and POCO) Usually set up automatically after installation SIM-maps, but sometimes users have problems with no connection, low speed or authentication error. APN, firmware conflicts MIUI, or even in the features of the Modem module on specific models (for example, Xiaomi) 13T Pro or Redmi Note 12).

In this article, we will discuss three main methods of configuration: automatic configuration via SMS from MTS, manual input of APN parameters (with current data for 2026), as well as the diagnosis of typical errors - from the absence of a 4G/5G icon to problems with IPv6. We will pay special attention to the nuances for devices with dual SIM and those who use MTS eSIM. If you just bought a new Xiaomi or updated firmware - this guide will help avoid hours of pointless reboots and calls in support.

1. Preparation of Xiaomi smartphone to set up mobile Internet

Before you start changing your settings, make sure your Xiaomi is ready to work with the MTS network.

• 📱 Check compatibility. SIM-MTS supports nano-SIM (most of today’s Xiaomi) and eSIM (available on flagships like Xiaomi 14 Ultra). If you have an old micro-SIM, it will have to be trimmed or replaced in the cabin of the operator.
• 📶 Check the coverage: Go to the MTS coverage site and check if it is supported in your area. 4G/5G. For example, in some areas of the Crimea or the Far East, there can be only 3G.
• 🔄 Update the firmware MIUI: Go to Settings. → The phone. → System updates: Outdated versions (e.g, MIUI 12 on the Redmi. 9A) They may not work properly with new parameters. APN.

If you use two of them SIM-maps, make sure that mobile data is included for the slot with the MTS card:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose. SIM-MTS card and activate the option Mobile data.
3. In the Network Type section, set 4G (preferably)/5G.

⚠️ Note: On some Xiaomi models (e.g, POCO X5 Pro) upon activation 5G If you travel frequently, it is best to leave priority on the roaming. 4G.

2. Automatic setting of the MTS Internet via SMS

The easiest way is to get the settings automatically. MTS sends configuration data via SMS, which Xiaomi's smartphone must apply on its own.

1. Open the Messages app and create a new SMS.
2. In the recipient field, enter the number: 1234.
3. In the text of the message, write: Internet (registration is not important).
4. Send an SMS and wait for a response with settings (usually within 1-2 minutes).
5. After receiving the message, click on the link or confirm the setting of the parameters.

If SMS didn't come:

• 🔄 Restart the phone and repeat sending.
• 📵 Check if it's blocking. MIUI Service Messages: Settings → Annexes → Communications → Permits → SMS.
• 📡 Make sure you have enough funds in your account (sometimes the operator blocks services with zero balance).

After you set the settings, restart the device. If the Internet doesn't work, go to manually set up the APN.

💡

If you have an MTS eSIM, the automatic setup may not work. QR-code from MTS personal account or manual input APN.

3. Manual setting up APN for MTS on Xiaomi

If the automatic method doesn't work, you'll have to enter the parameters manually.

Instructions for entry:

1. Go to Settings. → SIM-maps and mobile networks → [Choose. SIM MTS] → Access points (APN).
2. Click Add Access Point (or + icon in the upper right corner).
3. Fill in the fields as above. Leave the rest of the parameters (e.g. Proxy or Port) blank.
4. Save the settings and select the profile you created in the APN list.
5. Reboot the phone.

⚠️ Attention: On some firmware MIUI (For example, on Xiaomi. 12T Global version field type APN may be called APN Type: Enter default,supl,mms if the mobile Internet is not working even after saving.

Correctly entered APN (internet.mts.ru)| Username and password match (mts)| APN type contains default| IPv4/IPv6 protocol enabled | No unnecessary gaps in fields-->

5G setup on Xiaomi for MTS network

If your Xiaomi supports 5G (like the Redmi Note 12 Pro+ 5G or Xiaomi 13T Pro) but the network is not catching, follow these steps:

• 📡 Check the cover. 5G in your region on the map of MTS. In some cities (for example, in Sochi or Kazan) 5G It only works in the center.
• 🔧 Activate the mode. 5G In settings: Go to Settings → SIM-maps and mobile networks → [Choose. SIM MTS] → Type of network. 5G (preferably LTE/5G.

🔄 If you're optional 5G Is not available, update the firmware or check if the module is disabled 5G in the engineering menu (see section below).

For models with MediaTek Dimensity (e.g., POCO X5 Pro 5G), additional customization may be required:

##4636## → Phone Information → Install preferred network type → NR/LTE/UMTS/GSM

⚠️ Attention: On some firmware MIUI Europe (EEA) option 5G This is hidden because of operator restrictions, and you'll need to reflash the device to a global or Russian version.

5. Diagnostics of problems with mobile Internet

If the Internet still does not work after setting up, use this instruction to find a malfunction:

🔍 Symptoms. 1: No badge. 4G/5G, But the calls are working.

• Check if mobile data is included in the notification panel.
• Make sure you choose the right one. APN-profile (see section 3).
• Try to manually select the operator's network: Settings → Mobile network → Network operators → Select manually → MTS.

🔍 Symptom 2: The Internet is working, but very slowly

• Turn off IPv6 in the APN settings (leave only IPv4).
• Check if traffic saving mode is activated: Settings → Connections and Sharing → Traffic saving.
• If you use a VPN, turn it off – some servers limit speed.

🔍 Symptom 3: Authentication error (incorrect password)

• Remove all saved APNs and create a new one (see Section 3).
• Check the balance – sometimes MTS blocks access in a negative account.
• If the problem occurs on Xiaomi with MIUI 14+ and eSIM firmware, try reinstalling the eSIM profile through the My MTS app.