How to turn it on SIM-Xiaomi map: from installation to error elimination

You just bought a new Xiaomi smartphone, inserted SIM-card, but the phone doesn't catch the network? MIUI Did the mobile phone stop working? This problem is familiar to many owners of Redmi devices, POCO or Black Shark -- even if you install a SIM card correctly, the network may not automatically activate, and 80 percent of the time, it's not hardware faults that are to blame, but incorrect settings or software failures.

In this guide, we will analyze all the stages - from the physical installation SIM-maps to manually configure network settings. You will learn how to check the compatibility of the SIM with your Xiaomi model, what settings are available MIUI They're the ones who are responsible for mobile communication, and what to do if the phone says "No service" or "Emergency only." We'll focus on two-symbol models, where there are often conflicts between slots.

Important: the instruction is relevant for all modern Xiaomi smartphones based on MIUI 12-14 and HyperOS (including Redmi Note 12/13, POCO X5/F5, Xiaomi 13/14). If your device is older than 2018 release, some menu items may differ - check the firmware version in Settings → About phone.

1. Preparation SIM-maps: format, cropping and compatibility

Before you insert a SIM card into Xiaomi, make sure it fits the format.The brand's modern smartphones support:

• 📱 Nano-SIM (4FF) — Standard for all models after 2016 (including the Redmi 9, POCO X3, Xiaomi 11).
• 🔄 eSIM – only in flagships (Xiaomi 13 Pro, 14 Ultra) and some models for the European market.
• ❌ Micro-SIM (3FF) and mini-sim (2FF) — not supported without an adapter.

If you have an old-style SIM card, you can cut it yourself or in the operator's cabin. Using an improperly cropped Nano-SIM can damage the slot contacts, which in 15% of cases requires repair of the motherboard. Check the SIM for chips and burrs before installing.

💡

If you crop the SIM card yourself, use the Nano-SIM template and leave a stock of 0.2-0.3 mm at the edges. Metal contacts should not protrude beyond the plastic base.

Also make sure that yours is yours. SIM-map:

• 🔄 Active with the operator (not blocked for non-payment).
• 📡 Supports the frequencies that your Xiaomi works (e.g. Redmi Note) 12 range-critical B1/B3/B7/B20 for 4G).
• 🚫 It is not a “virtual” SIM (e.g. from Tinkoff Mobile or Yota) unless your model supports eSIM.

2. Where and how to insert SIM-map

Tray for SIM-Xiaomi is usually located on the left or right side of the card (rarely on top, as in Black Shark 5:

1. Turn off your phone (optional, but recommended for safety).
2. Take a paper clip or a special key from the kit and insert it into the hole next to the tray.
3. Press until you click - the tray will be pushed out by 2-3 mm, after which it can be pulled out with your fingers.

Look at the tray, and it has a SIM card layout, for example, in the Redmi Note 11 Pro, the SIM 1 slot supports 5G, and the SIM 2 only supports 4G. If you confuse places, one of the sims may not work at maximum speed.

Is the phone off (optional) |

Does the format of the simka match the tray (Nano-SIM)|

Any damage to the SIMKA contacts |

Is the SIMKA correctly oriented (skip to tray corner) |

Whether the tray is closed before clicking after installation-->

Turn on your phone and wait for the network indicator to appear (usually 1-2 minutes). If the network icon does not appear, move to the next section.

Activation SIM-card MIUI

Even if the SIM card is physically installed, it may need to be activated manually.

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose the right one. SIM-card (if two of them).
3. Make sure the switch "Switch on" SIM-The map is active (the slider must be blue).
4. Check if the network is manually selected or automatically selected.

If the option “Include” SIM-The card is not active or is not active, which may mean:

• 🔌 SIM card not recognized (check the installation or integrity of contacts).
• 🔄 An outdated version MIUI (Update the firmware in Settings → The phone. → Updating the system).
• 🚫 Hardware locking (for example, after unofficial firmware).

For two-symbol models (Redmi Note 10 Pro, POCO F4, etc.) in the menu SIM-cards and mobile networks can be configured:

• 📞 Basic SIM-call card (default — SIM 1).
• 🌐 Basic SIM-mobile-internet.
• 🔄 “Dual standby mode» (DSDS) — Allows both SIMs to be active at the same time.

One (main only)|Two (work + personal)|Two (for different operators)|eSIM + physical SIM|I don't know-->

4. Manual connection to the operator's network

If the automatic registration on the network did not work, try to connect manually:

1. Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Choice of network.
2. Turn off the Automatic option and wait for the phone to find the available networks.
3. Select your operator from the list (for example, MTS, Beeline, Tele2).
4. Click on “Connect” or “Register”.

If the network is not located:

• 🔍 Check the coverage of the operator in your area (for example, on the website cart.guru or 2gis).
• 📡 Make sure the phone is on mode. 4G/5G (same-setting SIM-map).
• 🔄 Restart your phone and repeat the search.

For models with 5G support (Xiaomi 12T, Redmi K50), the network settings may include the option Preferred Network Type.

• 5G/4G/3G/2G (auto) for maximum speed.
• Only 4G – if 5G is unstable in your area.

💡

If the phone does not find the operator's network manually, this may indicate a frequency incompatibility or hardware malfunction of the communication module.

5.Error Resolving: "No maintenance", "Emergency Calls Only"

If after all the manipulations the phone writes “No service” or “Emergency calls only”, check the following points:

The most common problem is that you have the wrong APN settings to reset them:

1. Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Access points (APN).
2. Click on the three dots in the top right corner and select Reset to Default Values.
3. If this does not help, add APN manually (options can be taken on the operator's website).

💡

For MTS, Beeline and Megaphone operators, APN settings are usually loaded automatically. If they are not available, send an SMS with the text "APN" to 5049 (for Beeline) or use the official operator application.

If the problem persists, check the phone's IMEI:

1. Dial *#06# - two 15-digit numbers should appear (for dual-simage models).
2. If zeros or Invalid are displayed instead of IMEI, it means a firmware failure or hardware breakdown.

⚠️ Attention: If IMEI reset after firmware, do not attempt to restore it through third-party programs (for example, MTK Engineering or ChimeraTool, which may result in a network lock.

6. Features for different Xiaomi models

Some Xiaomi models have unique nuances when working with the SIM-map:

• 📱 Redmi Note 11/12 and POCO X4/X5: Slot SIM 2 It can conflict with microSD. If you use a memory card, insert the SIM only in the memory card. SIM 1.
• 🔄 Xiaomi 13/14 Mix Fold 2/3: Supports eSIM, but requires activation MIUI 14+ and official firmware.
• 🚫 Black Shark 4/5: In game mode, the mobile network can shut down to save battery.Check Shark Space settings.
• 🌐 Redmi A1/A2 (Budget models: may not support some ranges 4G (for example, B20 for Tele2).

For models with HyperOS (e.g. Xiaomi 14 or Redmi) K70) path SIM-mapping:

Settings → Connections → SIM-cards and mobile network

If you have POCO with global firmware, some options (like VoLTE) may be hidden to enable them:

1. Please dial the phone application ##4636##.
2. Select Phone Information.
3. Scroll down and turn on "VoLTE provisioned."

⚠️ Note: On Xiaomi smartphones for the Chinese market (with China firmware) ROM) There may be no support for Russian operators. 4pda.ru or miui.su.

Verification of work SIM-post-activation cards

To make sure that SIM-The card is working correctly:

• 📞 Call another phone (e.g. 112 – emergency call).
• 🌐 Turn on the mobile Internet and check the speed at speedtest.net.
• 📶 Make sure the status bar shows the operator name and network type (4G, 5G, H+).
• 🔄 Switch between SIM cards (if there are two) and check each one.

If the mobile phone is not working, but calls are made:

1. Check your account balance (the traffic may have run out).
2. Make sure that the APN settings indicate the correct APN type (usually default,supl).
3. Turn off the VPN (if you use it) – it can block mobile traffic.

Applications can be used to check the quality of communication:

• Network Cell Info Lite – shows the signal level and neighboring towers.
• OpenSignal tests the speed and stability of the network.
• MIUI Hidden Settings – gives access to hidden settings of the mobile network.

FAQ: Frequent questions on SIM-maps on Xiaomi