Cleanup SIM-Xiaomi maps: a complete guide with step-by-step instructions

The Xiaomi SIM card isn't just a plastic chip to identify you on the network, it accumulates data over time: contacts, messages, network settings, operator cache, even temporary files from apps. If you notice that the phone is getting slower to connect to the network, you get errors like this "SIM-The card is not supported, or the network is not supported, and the memory is full, and it's time to clean it up, but how to do it correctly so that you don't lose important contacts and mobile communication is not disrupted?

In this article, we will discuss all possible cleaning methods. SIM-maps on Xiaomi devices - from basic (delete contacts and messages) to advanced (reset network settings and formatting through the engineering menu). SIM-Cards: Redmi Note 12 Pro+, Poco X5 Pro, Xiaomi 13T), where clearing one card can affect the second card, and you will also learn what actions can lead to blocking. SIM-The operator’s card and how to avoid it.

1. Why. SIM-The map should be cleaned and when to do so

Many users do not even realize that SIM-The card has its own memory, albeit a small one (from 32 KB to 256 KB in modern eSIMs:

• 📇 Contacts – even if you sync them with your Google Account, copies remain on your account. SIM.
• 💬 SMS and MMS — Some operators save them on the map by default.
• 📡 Network settings — APN, roaming parameters, data on preferred networks (2G/3G/4G/5G).
• 🗑️ Operator cache – temporary files to speed up connection (for example, when changing base stations).

When memory is filled, problems arise:

• ⚠️ The phone is no longer keeping new contacts on the phone. SIM.
• ⚠️ Errors are emerging "SIM-Card is full or "Not enough memory".
• ⚠️ Slows down the connection to the network (especially when switching between the two) 4G and 5G).
• ⚠️ No SMS from banks or services (due to overcrowded storage).

⚠️ Attention: If yours SIM-card over 5 years old, cleaning may not help - modern networks (e.g. VoLTE or 5G) They need to have the chips updated, and then you'd better go to the operator and get the replacement.

Clean up SIM-The card is recommended in the following cases:

• 🔄 Before selling or transferring a phone to another user.
• 📉 With a noticeable deterioration in the quality of communication (frequent breaks, long connection).
• 🔧 After changing the operator or tariff plan (to avoid setting conflicts).
• 📱 When switching to a new smartphone (for example, from Redmi 9 to Xiaomi 14).

Method 1: Removal of contacts and messages from SIM-map

The easiest and safest method is to clean up user data, which is suitable if you need to make room for new contacts or fix errors when sending SMS.

How to remove contacts from SIM-maps on Xiaomi:

1. Open the Contacts app.
2. Press three points (⋮) in the upper right corner and select Contact Management.
3. Go to the tab. SIM (If you have two cards, choose the one you want).
4. Click Remove All or highlight unnecessary contacts manually.

How to clean up SMS saved on SIM:

1. Launch the Messages app.
2. Click on the icon. ⋮ → Settings → Additionally. → Message repository.
3. Choose. SIM-map and press Clear.

⚠️ Note: Some Xiaomi models (e.g. Poco) F4 or Redmi K50) SMS is stored in the memory of the phone, not on the phone. SIM. Check the storage settings before cleaning!

If you are afraid of losing important contacts, export them first:

For export contacts:

1. Go to Contacts. → ⋮ → Contact management → Imports/Exports.
2. Choose Export to Device or Export to Google.
3. Specify the source SIM-card and save the file (e.g. in.vcf format).

Method 2: Resetting mobile network settings

If the problems are not with memory, but with connection (for example, the phone does not catch the network or constantly switches between the two devices). 3G and 4G), It's going to help reset the network settings. SIM-map, but returns to factory parameters:

• 📶 APN (Internet-hotspot).
• 🔄 Switching settings between networks (2G/3G/4G/5G).
• 🌍 Roaming parameters.

Instructions for discharge:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose the right one. SIM-card (if two of them).
3. Click Reset Mobile Network Settings (in some firmware) MIUI This item is called the Dumping APN).
4. Confirm the action.

Once reset, the phone will automatically load settings from the operator, but sometimes manual setup is required. APN. For example, use MTS for the:

⚠️ Attention: On models with MIUI 14 and newer (e.g. Xiaomi 13 Ultra) reset APN This can cause you to temporarily lose your VoLTE connection, so to restore it, restart your phone or turn on/off the plane mode.

💡

If the Internet does not work after the reset, check if the data transfer is enabled for this purpose. SIM-card SIM-maps and mobile networks → Transfer of data.

Method 3: Formatting SIM-Maps through the Engineering Menu

This is an advanced method that completely clears the memory. SIM--Maps, including operator service details, suitable for correcting serious errors, but requires caution.

How to open the engineering menu on Xiaomi:

1. Open the Phone app.
2. Enter the code ##4636## (to check network information) or #36446337## (to test) SIM).
3. Select the Information item or SIM Test.

For formatting:

1. In the engineering menu, find the section SIM management USIM Toolkit.
2. Choose Format. SIM reset USIM.
3. Confirm the action (it may be necessary to enter) PUK-code).

⚠️ Note: Formatting deletes all data, including hidden operator files. SIM-The card is tied to the corporate tariff or banking services (for example, Sberbank Online), after formatting, it may be necessary to reactivate the card!

On some models (Poco) X3 Pro, Redmi Note 11) Engineering menu locked:

adb shell am start -a android.intent.action.MAIN -n com.android.settings/.TestingSettings

This command needs to be entered through ADB (Connecting the phone to the PC with debugging enabled USB).

5. Method 4: Cleaning through operator applications

Many operators provide their own utilities for management. SIM-They allow you to clean up your memory without the risk of damaging your system files.

Applications for popular operators:

• 📱 MTS: My MTS (Section Management) SIM).
• 📱 Beeline: My Beeline (Settings tab) SIM).
• 📱 MegaFon: MegaFon-Service (Memory Cleanup Item).
• 📱 Tele2: My Tele2 (Section) SIM-manager).

How to clean up SIM via operator:

1. Download your operator’s official app from Google Play.
2. Sign in (you may need to enter your phone number and password).
3. Find the control section SIM-by card (usually in the Settings or Services menu).
4. Select the option to Clear Memory or Reset Settings.

Advantages of this method:

• ✅ Security – the operator controls the process and avoids critical errors.
• ✅ Preservation of the tariff – settings of services (Internet, minutes, SMS) are not reset.
• ✅ eSIM support – works for virtual SIM-map.

⚠️ Note: If you use eSIM on Xiaomi 12T Pro or Poco F5, Cleaning through the operator's application may require re-activating the profile. QR-code!

6. Method 5: Complete reset of the phone (extreme case)

If none of the methods helped, the problems with SIM-The card is saved (for example, the phone does not recognize it or constantly asks for it). PUK-The code, the last option, hard reset, erases all the data on the phone, including the settings. SIM.

How to make a reset to factory settings:

1. Go to Settings → About the phone → Reset settings.
2. Choose to erase all data.
3. Enter your password (if installed) and confirm.
4. After restarting, reset the phone.

What happens after the dump:

• 🔄 All contacts, messages and applications will be deleted (except for those on the SIM-map).
• 📡 Network settings will return to factory settings (including: APN).
• 🔐 SIM-The card will remain active, but some services may need to be re-activated (e.g., VoLTE or ViLTE).

⚠️ Attention: On devices with MIUI 13/14 and data encryption (Xiaomi) 13, Redmi K60) After reset, you may need to enter an old password to decrypt the internal memory. If you forget it, the data will be lost!

1. Make a backup through Settings → Additionally. → Backup and reset.

2. Extract. SIM-If you doubt the card’s performance (so as not to block it when resetting).

3.Write it down. IMEI phone (click *#06#) - you may need it to restore the connection.-->

7. Frequent mistakes and how to avoid them

Cleanup SIM-Cards seem like a simple procedure, but many users make mistakes that lead to card locking or loss of communication:

Pay particular attention to the following points:

• 🔐 PUK-Code: If you enter incorrectly 3 times PIN, SIM It's locked. You can only unlock it. PUK-code (indicated on the package) SIM or in the operator's personal office).
• 📶 Roaming: After cleaning SIM Roaming settings may be lost. Check it in Settings. → SIM-map → roaming.
• 💳 Banking services: If SIM tied to Apple Pay, Google Pay or a banking app, after cleaning may require re-attachment.

After cleaning, SIM-map stopped working:

1. Reboot the phone.
2. Check it out. SIM in another device (to eliminate hardware malfunction).
3. Contact the operator – the card may be damaged or blocked.

FAQ: Answers to Frequent Questions