How to clean properly SIM-Map on the phone Xiaomi: all the ways

SIM card in Xiaomi smartphones (including Redmi models, POCO And Black Shark, over time, gets filled with unnecessary data, old messages, contacts, network settings and operator cache, which can lead to communication failures, slow mobile Internet, or even errors such as "SIM-The card is not supported. Unlike cleaning the phone's internal memory, the system is not supported. SIM Carefulness – Mistakes can delete important data or disrupt the network.

In this article, we will discuss all safe cleaning methods. SIM-Xiaomi cards without the risk of damaging it or losing access to mobile communications:

• 📱 Remove the old ones SMS and contact directly with SIM
• 🔄 Reset network settings without data loss
• 🗑️ Freeing up the memory SIM cache-to-catch
• 🔧 Correct errors of the type "SIM-Card not detected" or "Registration error"
• 📡 Optimize work 4G/5G cleansing

Important: Procedures are different for physical SIM (Nano-SIM) and eSIM (in models like Xiaomi 13 Pro or Mix Fold 3) will be specified in the specifications for each type.

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

A SIM card is not just a chip to identify on the network, it stores:

• 📞 Contacts (up to 250-500 units, depending on the operator)
• 💬 SMS-Messages (usually the last 50 to 100 pieces)
• 📡 Network settings (APN, Roaming parameters, priority of networks 2G/3G/4G/5G)
• 🗃️ Operator cache (temporary data to speed up communication)

When memory SIM It is overflowing, and typical problems arise:

When it is necessary to clean SIM:

• 🔹 Before the phone firmware (especially when switching to custom firmware like LineageOS)
• 🔹 After changing the operator (to avoid conflicts between old and new settings)
• 🔹 When travelling abroad (cleaning helps avoid roaming issues)
• 🔹 If the phone stops seeing the network after the update MIUI

⚠️ Attention: Don't clean. SIM, If you are active USSD-Requests (e.g., waiting for payment confirmation via *123#) may interrupt the transaction.

2. how to delete contacts and SMS s SIM-map

On Xiaomi smartphones, contacts and messages are stored in internal memory by default, but some of them can be duplicated on the device. SIM. To remove them:

Method 1: Through the standard "Contact" application

1. Open the Contacts app (Icon) 📇).
2. Press three points (⋮) top-right → Contact management.
3. Choose Import/Export → Remove from SIM-map.
4. Mark unnecessary contacts and click Delete.

Method 2: Through settings SIM-map

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM → Contacts SIM-map.
3. Press the contact. → Remove (or highlight a few and remove a package).

Removal SMS s SIM:

1. Open the Messages app (💬).
2. Press three points (⋮) → Settings → Additionally. → Message repository.
3. Select to delete messages from SIM-map.

⚠️ Attention: On some firmware MIUI (especially custom) option to remove contacts from SIM In this case, use the operator's application (for example, "My MTS" or "My Beeline").

3. Reset network settings without data loss

If the mobile Internet is unstable or the phone does not catch the network, the settings may be to blame. APN They're not going to affect personal data, but they're going to return network settings to factory settings.

Instructions for Xiaomi:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM → Settings of access points (APN).
3. Press three points (⋮) → Resetting to default values.
4. Confirm the action.

If there is no reset option:

1. Delete everything. APN manually (click on each one) → Delete).
2. Reboot the phone.
3. The operator will automatically send new settings (may need to send a message). USSD-code, for example, *111*181# for MegaFon).

For models with eSIM (Xiaomi) 13/14 series, Mix Fold):

• 🔹 Reset APN It is done in the same way as for physical SIM.
• 🔹 If the eSIM has stopped working, try to delete and re-activate the profile through the operator’s application.

💡

If after discharge APN Internet is not working, check if the mobile Internet is enabled in quick settings (swipe down from the top edge of the screen).

4.Cache cleaning SIM-Cards (hidden operator data)

Kesh. SIM-These are temporary files that the operator saves to speed up the network connection, and over time they may conflict with new firmware or phone settings, and can only be cleaned through an engineering menu or special codes.

Method 1: Through USSD-codes (not available for all operators)

##4636## → Phone Information → Select SIM → “Clear Statistics”

Or for some operators:

*#9900# → "Delete dumpstate/logcat" → "Run"

Method 2: Through the Engineering Menu (Take Care!)

1. Enter the code ##36446337## (or #4636## on new models).
2. Go to Engineer Mode → Engineer Mode (MTK) (for MediaTek processors or Qualcomm Settings (for Snapdragon).
3. Choose Telephony → SIM Management → Clear SIM Cache.

⚠️ Attention: Incorrect actions in the engineering menu can disrupt the communication module. USSD-Codes or contact the service center.

5. Complete discharge SIM-cards (extreme case)

If other methods do not help, you can perform a complete reset. SIM-This will delete all data, including contacts, messages and settings, but return the card to a "clean" state.

Instructions:

1. Go to Settings. → Memory. → SIM-map (or settings) → Additionally. → Reset on some firmware).
2. Select Reset. SIM-cards (or Clearing) SIM).
3. Confirm the action (it may be necessary to enter) PUK-if SIM blocked).

What to do after the discharge:

• 🔹 Reboot the phone.
• 🔹 Wait for the automatic setup APN (or manually set up).
• 🔹 Restore contacts from backup (if you did).

On Xiaomi models with Snapdragon processor 8 Gen 2/3 (for example, Xiaomi 14 Ultra) full discharge SIM may require additional activation through the operator's application.

6 How to avoid problems after cleaning SIM

After cleaning. SIM-The card should be followed by several steps to ensure that the phone is stable:

1. Checking of registration on the network

• 📶 Enter. USSD-code #0011# (for Samsung chips) or #4636##* → Phone information.
• 📶 Make sure that the service state is in service.

2. Network priority setting

1. Go to Settings. → SIM-maps and mobile networks → Preferred type of network.
2. Choose. 4G/5G (recommended or Only 4G (if 5G unstable).

Update eSIM profile (if used)

• 🔹 Open the operator's app (for example, "My Tele2").
• 🔹 Find the eSIM Management section → Update profile.

💡

After cleaning. SIM Always reboot your phone – this allows the communication module to re-initialize the card and avoid errors such as "SIM-map not found".

7. Frequent errors and how to fix them

Even after proper cleaning SIM There may be problems. Let's look at the most common ones:

If nothing helps:

• 🔹 Try inserting. SIM to another phone – if the error persists, the problem is in the card (refer to the operator).
• 🔹 Update the firmware MIUI Up to the latest version (sometimes bugs are fixed in new builds).
• 🔹 Make a factory reset (last option, as it will delete all data from the phone).

FAQ: Answers to Frequent Questions