When Xiaomi Redmi suddenly loses access to the network through the MTS operator, users often find that the communication indicators show a confident signal level, and 4G or LTE are active, but the pages in the browser do not load. This is a common problem that can be caused by both a software failure in the MIUI shell and incorrect settings of the access point.
In most cases, the cause is automatic system updates that overwrite configuration files, or physical damage. SIM-Mobile Internet is a critical feature, and its absence paralyzes messengers, navigation and banking applications. Before panicking or carrying a device into the service, it is worth conducting a series of diagnostic manipulations.
In this guide, we will go into detail on how to set up APN settings, why you should ignore standard carrier profiles, and how to force Redmi to switch network mode for stable operation in fourth-generation networks.
Primary Diagnosis and Balance Check
The first step should always be to check the account status and activity of the SIM card itself. Often subscribers forget that the traffic packet may have run out or reached the end of the tariff plan.
Make sure that the Mobile Internet service is activated in your personal account. USSD-If the balance is negative, top up the account and restart the device, as some Xiaomi models do not restore the connection automatically after the funds appear.
It’s also worth checking whether Air Messages or Traffic Savings are enabled, which can block background data transfers for all applications. Redmi owners need to pay attention to the Dual SIM settings: sometimes the Internet is assigned to a second SIM card that currently has no network coverage.
⚠️ Note: If after rebooting and checking the balance indicator 4G/LTE burning, but the Internet does not work, the problem lies deeper - in the settings of the access point or software conflict.
It's not superfluous to check the Internet on another device. SIM-If the network is working properly, then the problem is only in the software of your Xiaomi smartphone.
Setting up an APN access point for MTS
The most common cause of broken Internet on Xiaomi is downed or missing APN hotspot settings. Android requires the exact address of the gateway to access the global network. On Redmi devices, these settings are often confused after updating the firmware or changing the region.
To fix this, you need to create a new profile manually. Don't rely on automatic SMS settings from the operator, as they may not be compatible with the current version of the MIUI shell. Go to the settings menu and find the section responsible for SIM cards and mobile networks.
Inside the menu, select your MTS SIM card and go to Access Points (APN) where you will see a list of existing profiles. Click New Access Point or Plus in the corner of the screen, and you will need to enter the following data, which are standard for the operator:
- 📡 Name: MTS Internet (any of these can be specified)
- 🔗 APN: internet.mts.ru
- 👤 User name: mts
- 🔑 Password: mts
- 🔄 Type APN: default,supl
Once you have entered, be sure to save the profile by clicking on the menu (three dots) and selecting Save, and then activate it by ticking or putting a circle next to the name. The access point should become active. If you don't, the phone will continue to use the old, non-working profile.
In some cases, you need to change the APN type to IPv4/IPv6. By default, only IPv6 can be used, which causes conflicts with some servers. Change this setting in the advanced profile settings. After saving the settings, turn on and off the flight mode to reboot the communication module.
☑️ Checking settings APN
Resetting network settings and re-registration in the network
If manually configuring APN didn’t work, a complete network reset is an effective method.This operation doesn’t affect your personal files, photos or contacts, but deletes all stored Wi-Fi passwords, Bluetooth settings and mobile network configurations. For Xiaomi Redmi, this often becomes the “magic pill.”
You can reset through the settings menu. Find Connections and Sharing or About Phone, then select Reset Wi-Fi, Mobile and Bluetooth. The system will alert you to the consequences, confirm the action. Once the phone is rebooted, it will search for the network as a new device.
An alternative is forced re-registration on the operator's network, which helps if the phone is getting stuck on a tower with a bad signal or there is a malfunction in the allocation of resources in the MTS network. Turn on the flight mode for 10-15 seconds, and then turn it off. The device will again undergo the authorization procedure on the network.
A more radical but effective method is to temporarily change the type of network: switch the smartphone to 2G only or 3G only, wait a minute, and then return the value of "LTE Preferred," which causes the Redmi modem to renegotiate the connection to the base station.
| Action. | Impact on data | Efficiency |
|---|---|---|
| Flight mode | No. | Low (temporary effect) |
| Change of network type (3G/4G) | No. | Medium |
| Resetting network settings | Removing Wi-Fi passwords | Tall. |
| Changing the SIM slot | No. | Medium (slot check) |
What if the reset didn't help?
Problems with SIM-card-and-slot
Physical condition SIM-The cards play a crucial role in connection stability. Old SIM cards that have been used for years can have erased gold contact or microcracks. In vibrating walking, contact with Xiaomi can disappear, leading to a breakdown of the Internet session.
Notice the size of the SIM card. If you've ever trimmed a large SIM to nano-SIM format yourself or in the cabin, its thickness may have been broken. Too thin a card may not reach the contacts in the Redmi tray, in which case using a special adapter or replacing the SIM card in the MTS salon helps.
Check the SIM card tray for dust and pile. Even a microscopic villi can prevent the contacts from fitting tightly. Blow the tray with compressed air. It's also worth trying to swap the SIM cards in places if you have a two-sim phone. It may be that the particular slot or antenna module responsible for it is faulty.
- 🔍 Visually inspect the chip for scratches.
- 🧼 Gently wipe the contacts with a soft cloth without pile.
- 📱 Check the work in another slot.
- 🆕 Replace. SIM-New card in the office of the operator (it is free of charge).
It is worth mentioning that some cheap copies SIM-cards or cards issued long ago (more than one year ago) 10 years ago, may not support modern encryption standards that require a network 4G/LTE. In this case, the phone can see the network, but not pass authorization for data transfer.
💡
Replacement SIM-It takes 5 minutes for the card to be in the MTS office and saves your number and rate.
Impact of MIUI Updates and Third Party Applications
The MIUI shell on Xiaomi smartphones is known for its aggressive energy-saving system, which can force the connection processes to close if it deems them to drain the battery, often after system upgrades.
Check your traffic and battery savings settings. Go to Settings → Battery → Charge Savings and make sure that there are no restrictions on the system processes and applications you use to check the Internet. Also, under Apps, look for Services and Updates and allow background activity.
Third-party applications, such as antiviruses, VPN-If you've recently installed such software, try to remove it or temporarily disable it. Conflicts in encryption protocols often cause the Internet to stop working in all browsers.
In rare cases, the firmware update itself is to blame. If problems began immediately after the update, it is worth checking the forums for bugs in a particular version of MIUI. Sometimes waiting for a patch or, for advanced users, a rollback to the previous version of the software helps.
⚠️ Attention: When in use VPN-Make sure that the “Always on” function is VPN» in Android settings is disabled, otherwise when the connection with VPN-The Internet server is completely gone.
Cleaning the cache of system services can also help. Go to application management, find Settings, click Clear → Clear Everything. This will reset system settings, but it won't delete your personal data. After that, the phone will require an initial setup, but the network modules should work correctly.
Technical work and regional features
The MTS operator periodically performs maintenance work at base stations, especially at night or on weekends, at which point the Internet may not work throughout the area, regardless of the model of your smartphone.
Regional features also play a role: In some buildings with thick walls or in underground parking lots, the 4G signal may not pass, and automatic switching to 3G/2G may be blocked by the phone settings or not at the operator in a given location.
If you are roaming (even in a local area), make sure you have the right option, without it, mobile Internet will not work, or the tariff will go at a very unprofitable basic rate, and the money will run out instantly.
You can use an engineering menu to diagnose it. Type ##4636## in your phone app. You can open the test menu. You can select Phone Information. You can see the actual signal strength (dBm) and force the network type to be set. If the signal value is below -110 dBm, you can't have a stable Internet.
💡
If none of the software methods did not help, and on other devices the SIM card works, the antenna module or radio module of the smartphone itself is probably faulty.