How to unlock calls on the phone Xiaomi Redmi: from SIM-pre-setting cards

You pick up your Xiaomi Redmi, you try to call, but the phone stubbornly ignores your attempts - the call button is inactive, there is an error "No network" or "Call blocked." Is the situation familiar? The reasons for blocking calls on Redmi smartphones (be it Redmi Note 12, Redmi 10 or older models) can be hidden in software failures and hardware problems – from incorrect settings. SIM-In this article, we'll look at all the scenarios and give you step-by-step instructions on how to restore the phone's ability to call and receive calls.

It's important to understand that call blocking is rarely accidental, and it's most often caused by one of the reasons: In-plane activation, communication module failure, parental control restrictions, problems with the system. IMEI We won’t list all the options, instead we’ll focus on practical solutions that work on 90% of Xiaomi Redmi devices. Let’s start with the simplest ways and gradually move on to more complex ones, including resetting settings and working with the engineering menu.

If your phone doesn't ring, but the Internet (mobile or Wi-Fi) is working normally, the problem is probably the phone settings. If the device is completely deaf (no calls, no mobile Internet), the communication module may be to blame or the phone's settings may be the fault. SIM-Anyway, don't panic: 80 percent of the time, you can solve the problem yourself without going to the service center.

1. Check basic settings: In-plane mode and reboot

To start with, the obvious is that sometimes blocking calls involves activating a mode that shuts down all wireless modules. On Xiaomi Redmi, this can happen by accident — for example, if you press a button combination or turn on the mode through a notification curtain.

To check and disable the "In the plane" mode:

• 📱 Swipe down from the top edge of the screen to open the notification bar.
• 🔍 Find the badge of the plane (usually in blue or orange).
• 🖱️ Slip it once to deactivate the mode.
• 🔄 Wait 10-15 seconds – the phone must automatically connect to the network operator.

If the icon is not present or is inactive, check the settings manually:

1. Open the Settings. → Connections and sharing → On the plane mode».
2. Make sure the switch is in the “off” position.
3. Restart your phone (press the power button and select Reboot).

⚠️ Note: Some Redmi models (e.g. Redmi) 9A Redmi 8: On the plane mode can be activated when the battery is low (less than 5.

If you still have your calls blocked after you turn off In-Air mode, you can move on to the next step, and you should also check if the power saving mode is activated, which can limit the operation of the communication module.

• 🔋 Go to Settings. → Battery and productivity → Energy saving regime.
• 🔄 Turn it off and restart the device.

2.Problems with SIM-card: check, reinstallation and cleaning of contacts

About 30% of cases of blocking calls on Xiaomi Redmi are related to a malfunction SIM-Even if the card looks normal, the contacts could oxidize, and the chip itself could get micro-damaged:

Step 1: Reinstallation SIM-map

• 🛠️ Turn off the phone (press the power button and select Turn off).
• 📱 Remove the tray for SIM-card using a paper clip (the hole is usually on the upper or lateral face).
• 🔄 Get it out carefully. SIM-check it for scratches or chips.
• 🧹 Wipe the card and tray contacts with dry soft cloth (an eraser can be used to clean oxidation).
• 🔙 Install the card back, making sure it lies flat (chip down).

Step 2: Checking the performance SIM-map

Put it in. SIM-If it doesn't work there, it's the card problem (reach out to the operator for a replacement) If it works, it's the slot or the software settings of Redmi.

Step 3: Set up the operator's network

Sometimes the phone can't automatically connect to the network because of a settings failure.

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Tap by Network Type and install «4G (recommended” or «3G» (if 4G catcherless).
4. Go back and select Network Operators → Network Search.
5. Wait until the search is complete and select your operator manually.

⚠️ Attention: On some firmware MIUI (especially custom) may not be the option of manual network search, in which case only resetting or flashing the.

If after all the manipulations the phone still does not catch the network, try inserting SIM-Sometimes one of the slots fails - this is a common problem with the Redmi Note 10 and Redmi. 9T.

3. Reset network and APN settings

If SIM-The card is good, but calls are still blocked, the problem may lie in the lost network settings or APN (This is especially true after updating the access point. MIUI switching operator.

Resetting network settings will return all connection parameters to the factory:

1. Open the Settings. → SIM-maps and mobile networks.
2. Tap on Network Settings Reset (or Mobile Network Reset on New Versions) MIUI).
3. Confirm the action and restart the phone.

Manual setting APN (if the dumping didn't help):

• 📱 Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
• 🔧 Put the badge on «+» or add APN.
• 📝 Enter your operator’s settings (you can find them on the official website or by calling in support).
• 💾 Save the settings and select a new one. APN active.

Example of settings APN For popular operators (Russia):

After preservation APN Restart your phone and check if you can make calls. If there's a problem, try removing any saved ones. APN and allow the phone to download them automatically (reboot is enough for this).

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If after discharge APN The phone won't ring, try inserting it. SIM-card to another slot (if there are two) – sometimes it helps to “wake up” the communication module.

4.Verification IMEI Unlocking through the Engineering Menu

If previous methods have not worked, the problem may be due to damage or discharge. IMEI — This is often after a failed firmware, factory reset, or mechanical damage. IMEI The phone will not be able to connect to the operator’s network.

How to check IMEI Xiaomi Redmi:

• 📱 On the phone keyboard, type *#06#.
• 🔍 One or two 15-digit numbers should appear on the screen (for devices with two numbers). SIM-map).
• ❌ If you see Null, Unknown or an empty field instead of numbers — IMEI knocked down.

How to restore the IMEI:

This will require access to the Engineering Mode, and attention: the wrong actions here can lead to a complete loss of communication!

1. Open the Phone app and dial ##4636##.
2. In the menu that opens, select Phone Information.
3. Scroll down to the block. IMEI and check the current values.
4. If IMEI No, click on the Update button (if it is active).

If the automatic update does not work, you can try to restore it. IMEI manually MTK Engineer Mode (for MediaTek phones) or Qualcomm Tools (for Snapdragon), however, this process requires root rights and special knowledge — if you're not sure, you better contact the service.

⚠️ Note: Some Redmi models (e.g. Redmi Note 11 or Redmi) K50) The engineering menu can be blocked by the manufacturer, in which case the resetting process can be done. IMEI It can only be done through the use of SP Flash Tool or EDL-regime.

If your Xiaomi Redmi doesn’t have a IMEI It's one of the few problems that almost always requires a professional intervention.

5. factory reset: Last chance without service

If all previous methods failed, you will have to reset your phone completely, which will delete all the data from the phone, but return it to its original state, which often solves the problem of blocking calls. Before reset, make sure to back up your important data!

How to reset Xiaomi Redmi to factory settings:

1. Open Settings → About Phone → Backup and Reset.
2. Select Settings Reset.
3. Check to clear all data (including internal memory if necessary).
4. Confirm the action and wait for the process to be completed (it will take 5-10 minutes).

Once reset, the phone will reboot and prompt you to go through the initial setup. SIM-Check the card and see if you have the opportunity to call.

⚠️ Note: Some Redmi models (e.g. Redmi 9 or Redmi) 8A) After the reset, you may need to re-activate the device through your Mi Account!

If the reset didn't work, it's probably hardware, like a communications module, an antenna, or a motherboard, and you can't do that without repair.

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Resetting to factory settings helps in 60-70% of software failures, but will not fix hardware failures (for example, a damaged slot). SIM-map).

6 Hardware problems: when without service can not do

If none of the software methods worked, the reason for blocking calls is hardware. Here are the most common hardware problems on Xiaomi Redmi:

• 📡 The antenna module is damaged, often after falls or moisture.Symptoms: the phone does not catch the network even from the working room. SIM-card.
• 🔌 Slot malfunction SIM-- the contacts may have gone or oxidized. SIM-map or see it unstablely.
• 📱 Motherboard problems, like the chip dump on the communication module, symptoms: no network, even after resetting.
• 🔋 Damage after an update is rare, but it happens that the firmware “kills” the communication module (especially on customized ones). ROM). Symptoms: The phone is working but not ringing or connecting to the mobile internet.

How to diagnose a hardware problem:

1. Check if the phone is rebooting (if so, it’s software-based).
2. See if there were any physical damage (shocks, falls, water hits).
3. Try flashing your phone with official firmware through Fastboot or EDL.

If you suspect a hardware breakdown, don't try to disassemble the phone yourself - this could make the problem worse.

Before visiting the service, check whether your Redmi warranty is valid, and if so, repairs can be free (for example, in case of a manufacturing defect).

7. Locking by the operator: what to do if the phone is blacklisted

It's rare, but it happens that calls are blocked not because of the phone, but because of the operator's restrictions.

• 💰 Non-payment – the operator blocks outgoing calls with a negative balance.
• 📵 Blacklist. IMEI — The phone is listed as lost or stolen.
• 🔒 Parental controls – if the phone is tied to a child’s rate.
• 📡 Roaming restrictions – in some countries, operators block calls to foreign countries SIM-map.

How to check and remove the blockage:

1. Call your operator’s hotline (the numbers are usually listed on the official website).
2. Please check if there are any restrictions on your number or IMEI.
3. If the problem is non-payment, replenish the account (sometimes the block is not removed immediately, but after 1-2 hours).
4. If IMEI in the black list, provide the operator with documents for the phone (check, warranty card).

To check status IMEI In the database of operators of Russia you can use the service checkimei.ru (enter your own). IMEI Check if it is listed as stolen).

⚠️ Note: If your Xiaomi Redmi was purchased by hand, there is a high risk that the previous owner did not remove it from the operator, in which case you can only unlock calls through the operator by presenting a contract of sale.

FAQ: Frequent questions about unlocking calls on Xiaomi Redmi