What? SIM-Choose a card for calls on the Xiaomi Redmi smartphone: format, operator, settings

Choice SIM-Xiaomi Redmi cards seem like a simple task — until you encounter nuances: some users suffer from a bad signal, others can not set up the Internet, still others find that their nano-SIM does not fit the slot. The reason most often lies in the wrong choice of card format, incompatibility with the operator’s networks or incorrect phone settings.

In this article, we will discuss all the selection criteria. SIM-Redmi cards – from physical format (nano, micro, eSIM) to supported frequencies 4G/5G You will learn how to check the compatibility of your model with a particular standard, what settings you must check after installing the card, and why sometimes even the right one is chosen. SIM And at the end, you have a checklist for quick purchases. FAQ typical.

Spoiler: If you have a Redmi Note 12 or Redmi 10C Not catching the network, in 80% of cases it is not to blame SIM-map, and the wrong parameters APN Or the bands that are off, but everything in order.

1. Formats SIM-What is the best map for Xiaomi Redmi

All modern Xiaomi Redmi smartphones (starting with the 2018 models) support only nano-SIM (4FF), the most compact physical format.

• 📱 Redmi 9/10/11 series, Note 9/10/11, POCO M3/M4/M5 — Nano-SIM (one or two slots).
• 🔄 Redmi 12/13 series, Note 12/13 — nano-SIM + ESIM availability (in some markets).
• ⚠️ Older models (until 2018, for example, Redmi) 5A) — You may need a micro-SIM (3FF).

If you have a nano-SIM from another phone, you can insert it into Redmi without an adapter, but if you have only a micro-SIM or a standard mini-SIM, you have to trim it or order a replacement from the operator, and carefully check the location of the chip: on the nano-SIM, it is shifted closer to the corner, and improper trimming can damage the contacts.

With eSIM, the situation is more complicated: officially Xiaomi supports virtual SIM only in some regions (Europe, India). In Russia, eSIM on Redmi works unstable - even if the phone supports technology, operators (MTS, Beeline, Tele2) may not provide a profile for Xiaomi.

2. Network compatibility: 4G, 5G and operator frequencies

Even if SIM-The card physically approaches the phone, it may not work at full power due to frequency incompatibility. 11 supportive 4G frequency-wise B1/B3/B5/B7/B8/B20/B28/B38/B40/B41, a) Your operator may only use your B3/B7/B20. The result will be a network, but the speed of the Internet is as 2010 year.

Here is a table of supported frequencies for popular Redmi models (relevant for Russia and the CIS):

To check what frequencies your carrier uses, go to its website or use the service FrequencyCheck. For example, MTS in Moscow actively uses B7 (2600 MHz) and B20 (800 MHz), and Tele2 – B3 (1800 MHz) and B7. If your Redmi does not support these bands, Internet speeds will be low, and calls may be interrupted.

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Before the purchase SIM-Check if your model supports VoLTE (voices through the cards) 4G). Without this function, the calls will be switched to 2G/3G, This is a problem that's causing a loss of communication. → SIM-maps and mobile networks → [yours SIM] → Voice communications → VoLTE

3 Which operator is best for Xiaomi Redmi in 2026

In Russia, the choice of operator for Redmi is reduced to the "big four": MTS, Beeline, Megaphone, Tele2.

• 📶 MTS is the best coverage 4G/5G, But it's a high price. It's good for the Redmi Note. 12/13 s 5G.
• 💰 Tele2: Cheap Fees, but Weak Support B41 (crucially POCO new Redmis).
• 🔄 Megaphone - stable 4G, but 5G It's only in big cities. 10/11.
• 📞 Beeline is a medium-sized cover, but often gives top-up bonuses.

If you need calls abroad, look for rates with roaming enabled (e.g., "All for communication" from MTS or "No Borders" from MegaFon). SIM-You can combine operators with cards: one for the Internet, the other for calls.

⚠️ Note: If you buy Xiaomi Redmi from Chinese stores (like AliExpress), check if it supports Russian frequencies. B20 (800 MHz, which is used by all Russian operators in rural areas.

4. Step-by-step instruction: how to install and configure SIM-map

Even the right ones. SIM-The card may not work if you don't install it correctly or if you don't configure your phone:

1. Turn off the phone (required!) Remove the tray for SIM-cards with a paper clip (the hole is usually on the right).
2. Put the nano-SIM in the tray chip down, as shown in the diagram inside the phone. If there is a second slot, repeat for the second card.
3. Turn on your phone and wait for the network to be determined. If there's no signal, go to Settings. → SIM-maps and mobile networks.
4. Choose yours. SIM-map and check: Is the mobile Internet on? Is the correct APN (Access point: VoLTE activated (if supported).

If the internet doesn't work, it's probably a problem with APN, and each operator has its own settings:

To add APNs manually:

1. Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Access points (APN).
2. Click "Add" and enter the data from the table above.
3. Save and restart the phone.

Typical problems and their solutions

After installation SIM-Something went wrong, here are the most common problems and ways to solve them:

• 🔴 No network: Check if it is inserted correctly SIM-card (reinstall the tray) Make sure the slot is not damaged (try another one) SIM). Update the phone software: Settings → The phone. → Updating the system.
• 📵 No Internet: Check the balance and tariff activity with the operator. Reset the network settings: Settings → SIM-maps and mobile networks → Reset mobile network settings. Delete and add APN freshly.
• 🔊 Poor call quality: Turn on VoLTE (if supported); turn off Wi-Fi Calling (may conflict with mobile network); try using another SIM-Card (possibly the operator has a problem).

⚠️ Note: If your Xiaomi Redmi is purchased abroad (e.g., the Chinese version of Redmi) K50), It may not support Russian frequencies. 4G/5G. Check out the model on Kimovil’s website – all supported ranges are listed there.

If nothing helps, try resetting the network settings to factory:

Settings → System → Resetting → Resetting Wi-Fi, mobile network and Bluetooth

This operation will not delete your data, but will return all network parameters to the state out of the box.

6. Two. SIM-Maps: How to set up Dual SIM Xiaomi Redmi

Most Redmi models support dual SIM (two physical nano-SIMs), but there are limitations:

• 📶 One network 4G/5G: if both SIM The second one will only work in 2G/3G.
• 🔄 Switching by default: you can choose which one SIM call-in, SMS and the Internet.
• ⚡ Quick switching: There is a button in the notification curtain to change SIM call-in.

To set up the Dual SIM:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select "Names" SIM-Cards" and assign each label (e.g., "Worker" and "Personal»).
3. In the Default for section, specify which SIM to use for calls, SMS and mobile internet.
4. Turn on the option of Dual Standby Communication (DSDSDS) if you want both SIMs to be active at the same time.

Important nuance: if you use a microSD card in a hybrid slot (for example, in Redmi) 9A), second SIM-The card will not work – you will have to choose between additional memory and a second sim.

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On models with support 5G (For example, Redmi Note 12 Pro+) dual-mode SIM 5G It will only work on one of them. SIM-The second one will automatically switch to the map. 4G/3G.

7. eSIM on Xiaomi Redmi: myths and reality

Many users have asked if it is possible to use eSIM on Xiaomi Redmi.The answer is: technically yes, but with reservations.

The eSIM only supports global versions of some models:

• Redmi Note 12 Pro+ 5G (for Europe and India)
• Xiaomi 13/13 Pro (not part of the Redmi line, but often confused).
• POCO F5 Pro (in some regions)

In Russia, the eSIM on Redmi is unstable for two reasons:

1. Operators (MTS, Beeline, MegaFon) do not provide eSIM profiles for Xiaomi.
2. In the firmware MIUI for Russia, eSIM support is disabled (even if the hardware supports it).

If you still want to try it,

1. Check if your eSIM model supports the GSMArena website.
2. Install global firmware (not Russian) through the Mi Flash Tool.
3. Contact the operator's salon for QR-eSIM code (clarify that the phone is Xiaomi).

⚠️ Warning: Unofficial activation of eSIM (through third-party services) may result in blocking IMEI Xiaomi does not provide support for such cases.

FAQ: Frequent questions about SIM-Maps in Xiaomi Redmi