Xiaomi 2 does not accept calls: deep analysis and troubleshooting

When Xiaomi 2 stops receiving incoming calls, and subscribers hear short beeps or a message of inaccessibility, it is critical for any user. Smartphone, which turns into a “brick” in terms of communication, loses its main function. Often the problem lies not in the physical breakdown of the antenna module, but in software conflicts or incorrect settings of the MIUI system, which can block network signals.

Device owners are suddenly confronted with this phenomenon: yesterday everything worked perfectly, today the connection is gone. This can be caused by a firmware update, a malfunction of the SIM card or the activation of hidden redirect functions. Diagnostics must begin with the software part, eliminating hardware defects only after checking all the settings. Ignoring simple steps can lead to an unnecessary data reset or a trip to the service center.

In this article, we will discuss in detail the algorithm of actions that will help return full functionality to your device. SIM-The following instructions will eliminate 95% of all known software causes of lack of incoming communication.

Diagnostics of network and status SIM-map

The first step should always be to check the physical condition. SIM-Even if the signal indicates a network, there may be micro-connection breaks that interrupt the process of establishing the voice channel, remove the SIM card tray and carefully examine the chip for oxidation or mechanical damage. Often contacts become contaminated, which leads to unstable operation of the communication module.

You're advised to manually re-register the network. Go to the settings menu, select the section. SIM-maps and mobile networks, and find Mobile Networks, turn off the operator's automatic choice and wait for the list of available networks to appear, choose your carrier by force, if the phone can't register even manually, the problem may be on the provider's side.

• 📱 Check if the operator name is displayed or if it only says "No network".
• 🔌 Wipe your contacts. SIM-cards with soft dry material, avoiding the use of liquids.
• 🔄 Try installing the SIM card in another slot if there are two of them to rule out a specific module breakage.
• 📶 Make sure that the network mode is set to Preferably LTE or 3G/2G, Because in some areas the coverage 4G It can be unstable for voice calls (VoLTE).

⚠️ Note: If after removal SIM-The phone will no longer see the network (insert the card). SIM"), The reader itself or the antenna plume may have been damaged, requiring the intervention of engineers.

It is also worth checking whether yours is worth it. SIM-The operator's own "antispam" or "blacklist" card, sometimes conflicting with the built-in functions of the smartphone, creating a double filter that blocks even the right numbers. Contact your operator's technical support to clarify active paid and free services.

Blocker and antivirus settings MIUI

One of the most common reasons why Xiaomi 2 doesn’t make calls is because of the aggressive operation of the built-in Security app. MIUI is known for its strict approach to filtering calls, which sometimes works incorrectly. The built-in blocker can mistakenly mark legitimate callers as spam or operate in Contact List Only mode if the settings have been changed accidentally.

To check, open the Security app (green zipper icon) and go to Antispam. Click on the settings icon (cogs) in the upper right corner. Check the Blacklist and Locking Rules section here. Make sure you don't activate full lockdown of all incoming or lock unknown numbers if you're expecting calls from new contacts.

Also, check the permissions for the Phone app. Go to Settings → Apps → All apps → Phone → Permissions. Don't let your contacts, microphone, and phone be accessed. If there's a ban, the system will automatically drop calls without even displaying them in a log.

• 🛡️ Turn off the “Block Hidden Numbers” feature if it is active to check if calls will pass.
• 📞 Check if your own number or loved ones’ numbers have been added to the blacklist by mistake.
• 🔄 Reset the antivirus settings to factory settings through the "Security" app settings menu".

It is important to note that third-party antiviruses (Avast, Kaspersky, Dr.Web) installed on top of the system can also intercept incoming calls. If you have such software installed, try temporarily disabling its protection or uninstall the application for verification.

Conflicts of modes of work: Do not disturb and Air Mode

Do Not Disturb is a common reason to ignore incomings. Unlike simple silent mode, it can completely block visual and audible alerts, and in some configurations, even the reception of the call itself, sending a busy signal to the subscriber. Check the status of this mode in the notification curtain or in the Sound and vibration settings.

There are exceptions to the Do Not Disturb settings. Often users forget that they are only allowed to call from "Favorites." If the caller is not on the favorite list, the call will be blocked. Also check the schedule: it may be that the mode is automatically turned on at a certain time of day and you just did not notice it.

Settings → Sound and vibration → Do not disturb → Rules → Calls

Another hidden enemy is Flight Mode, which can sometimes freeze when you exit this mode without restoring full GSM registration. Even if the antenna icon appears, the communication module may be in a state of error. Full shutdown and on the phone (reboot) helps to reset this stack.

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Use a quick command: turn on Flight Mode for 10 seconds, and then turn it off. This will force the radio to restart and often solves the missing network problem without a full reboot.

There's also a Pocket Mode feature that prevents accidental taps in your pocket. If the proximity sensor is contaminated or closed with film, the phone can think it's in your pocket, and jam the screen and the sound of the incoming call, even though the call itself is formally accepted.

Call forwarding and third-party applications

The problem may lie in the redirect settings that were activated earlier, if the number has a forwarding to another number (for example, voicemail or another phone) and this target number is not available, the caller will hear the beeps, but the connection will not occur, you can check this through the engineering menu or call settings.

In the Phone app, click three dots in the corner and select Settings → Accounts for calls (or just Call Settings). Find Redirect. Make sure that the "Disconnected" or "Voicemail" value is everywhere if you use it. Sometimes it helps to completely reset these settings.

Third-party number or call recording applications (Truecaller, Call Recorder) often require deep integration into the system. After an Android or MIUI update, they may stop processing the incoming stream correctly, blocking it. Try to delete such applications and check the operation of calls in the "clean" state of the system.

⚠️ Note: Resetting redirection settings through USSD-##002# is a universal solution that cancels all types of forwarding at the operator level. Enter this code in dialer and press the call button. Network reset and hardware checks If the software settings did not help, you need to reset the network settings. This will bring back the parameters. APN, Bluetooth and Wi-Fi to factory values, but won't delete your personal data (photos, contacts, apps).This is a secure operation that often solves problems with registering on the network. → Connection and sharing → Reset Wi-Fi, mobile Internet and Bluetooth, and after this procedure, the phone will reboot, you will need to re-enter the passwords from the Wi-Fi networks and check the Bluetooth headsets. ☑️ Checklist before resetting the network Save passwords from Wi-Fi Balance checked SIM-Maps Extracted SD-Card (just in case) Remembered pin code from SIMCompleted: 0 / 4 In rare cases, the problem is hardware in nature: if the phone fell, the antenna plume could move away or the lower board, where the charging connector and microphone, often associated with the antenna module, could be damaged. Also, oxidation of contacts after moisture can cause periodic communication loss. 🔋 Check if the battery is bloated, which can put pressure on the internal components. 🔌 Try calling with Wi-Fi Calling on and off (if supported). 📱 Testing the work with another SIM-You can use a map of another operator to rule out base station problems. You can log in to the engineering menu for advanced users to check the signal power ##4636## dialer. Select Phone Information. You can see the signal strength in dBm here. -110 dBm is a very weak reception, which can cause a call to fail?-50 dBm - Perfect signal (near the tower). -80 dBm - Good signal. -100 dBm - Boundary signal, possible breaks. -120 dBm and below - "Dead Zone", calls will not be received. FAQ: Frequently Asked Questions Why Calls Don't Go to One Specific Phone SIM-This indicates a problem with the SIM card itself (old chip, damage) or the operator's settings. Try replacing the SIM card with a new one in the salon, saving the number, and also check if the operator has blocked the service due to suspicious activity. Can the safety glass block the calls? Yes, if the glass covers the proximity sensor (usually located next to the speaker), the phone may not realize that you have brought it to your ear, and extinguish the screen, giving the impression that the call did not pass or reset. And thick glass can also shield the antenna if it's on top of the body. MIUI After major firmware updates, settings often get lost APN Do a network reset (described above) and make sure that the network type is selected under "Mobile Networks" LTE" or"LTE/3G/2G (Does crowded memory affect call reception? Extremely full internal memory can slow down the system so that the incoming call processing process does not have time to start and the call is reset. 1-2 GB space for stable operation of the system. 💡If none of the software methods helped, and the SIM card works in other phones, there is likely a malfunction of the antenna module or motherboard Xiaomi 2, which requires diagnosis in the service center.