Why I can’t get a call on MTS with Xiaomi, and I can call: full analysis of the problem

When you have no problem calling Xiaomi to an MTS number but your contacts can't reach you, one of the most annoying mobile phone problems is that the problem often arises spontaneously: Yesterday, everything worked, and today, calls just go into the void or are dropped after the first beep, 80% of the time, faults on the operator's side, but 20% - specific settings of the smartphone or the phone. SIM-map.

In this article, we will analyze all possible causes - from banal failure in the network to hidden parameters. MIUI, You'll learn how to test each option yourself without asking for support, and what to do if the problem lies in the firmware or hardware settings of Xiaomi. SIM and devices based on MediaTek - they are more likely to encounter similar glitches.

1. Problems on the side of the MTS operator: how to check

The first thing to rule out is the malfunction of the MTS network. The operator regularly performs technical work that can affect the routing of incoming calls, and these work are not always advertised: sometimes the malfunctions are local and affect only certain base stations.

To determine if the operator is to blame:

📡 Ask someone you know with another operator (like MegaFon or Beeline) to call your number. If the call passes, the problem is definitely on the MTS side.
📱 Check the status of the network on the official MTS website in the section "Technical works.
🔄 Reboot your smartphone and remove/paste SIM-Sometimes it resets the stuck sessions on the network.

If the problem is confirmed, you just have to wait for the service to be restored, but there's one life hack: try to force yourself to reconnect manually.

Go to Settings. → SIM-maps and mobile networks → Mobile network.
Select the network mode Only 2G (or 3G, if 2G idle).
Wait. 30 Seconds and go back to the automatic selection (4G/3G/2G).

⚠️ Note: If after these manipulations incoming calls have worked, but after a few hours the problem returned - this is a sign of unstable operation of the base station.

📊 How often do you have problems with incoming calls to MTS?

Once a week.

Once a month

Rarely, but accurately.

Never had.

2. Settings SIM-Maps in Xiaomi: hidden parameters

Xiaomi on firmware MIUI It has several pitfalls that can block incoming calls, especially when it comes to dual-use devices. SIM (double slot where the settings of one SIM-The cards may conflict with another.

The first thing to check is the priority. SIM-Call cards, even if you only use one. SIM, The system can misrout calls. How to configure:

Open the Settings. → SIM-maps and mobile networks.
Choose yours. SIM-MTS card and tap on the item "Priority for calls».
Check the box “Always use for calls” (if available).

The second thing is the call forwarding settings, which are sometimes activated randomly (like after a firmware update) and redirect all incoming calls to another number or voicemail.

Type *#62# on your phone keyboard and click "Call".
If you have a number for redirect, delete it by #62#.
Repeat the check for codes #61# (at work) and #67# (at unavailability).

What to do if the codes USSD not working?

If, after input, USSD-If you have no codes (e.g. *#62#) or an error, it may mean that the operator is blocking such requests. In this case, check the redirect settings via the menu: Open the Phone app. → «Settings. Select Call forwarding and disable all active rules.

The third potential cause is Do Not Disturb mode or a blacklist. MIUI These functions may not work clearly, for example, the default "Do Not Disturb" mode allows calls only from contacts, and sends all the rest to voicemail:

Go to Settings → Sound and vibration → Do not disturb.
Make sure the mode is turned off or set to Allow All Calls.
Check the blacklist: Settings → Annexes → Phone. → Blacklist.

3. Firmware conflicts MIUI and update

If the problem appeared after the firmware update, the fault may be a bug in the new version. MIUI. This is especially true for devices based on MediaTek processors (for example, Redmi Note 11, Poco). M4 Pro) where modem drivers sometimes conflict with updates.

The first step is to see if this is a massive problem.

🔍 Go to the Mi Community forum and find a topic to discuss your model.
📲 Check the reviews for the latest update in Settings → The phone. → Updating the system.

If the bug is confirmed by other users, there are two options:

Reverse to the previous version MIUI (If you have an unlocked boot loader).
Manually flash a more stable version through Fastboot or Recovery.

For models with Qualcomm Snapdragon (e.g. Xiaomi) 12T, Poco F4) Sometimes it helps to reset the modem settings:

Call the phone app: ##4636###


Go to “Phone Information” → “Wi-Fi settings”




From the menu, select Reset modem settings (if the option is available).

⚠️ Warning: Reset modem may temporarily shut down mobile network. After the procedure, restart the device and wait for re-registration on the network (up to 5 minutes).

Check the version. MIUI in “Settings” → The phone»

Find a discussion of bugs on Mi Community

Try resetting the modem settings

Turn off automatic software updates (if the problem appears after the update)

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4. Hardware problems: antenna, slot SIM-maps, modem

If the software methods didn't work, it's worth considering the hardware malfunctions, and most often the faults are:

📶 Damaged antenna (especially after falls or moisture).
🔌 Oxidized contacts SIM-card.
🛠️ Faulty modem (less common, but possible with overheating).

How to check:

Testing with another SIM-Insert the map SIM If the incoming calls are working, the problem is with MTS or yours. SIM-map.
Signal Check: Install the Network Signal Info app and see the signal level in dBm. -110 dBm, the connection will be unstable.
Visual inspection: Get out SIM-check the contacts for oxidation or contamination, and if necessary, wipe them carefully with a lasticle.

If you suspect an antenna damage, try to force a switch to another network:

Go to Settings. → SIM-maps and mobile networks → Choice of network.
Turn off Automatic and manually select the MTS network (if several options are available).
If the network is not located, it is a sign of hardware malfunction.

Symptoms.	Probable cause	Decision
Calls don't come, but SMS come	The problem with registering on the network for voice calls	Reset modem settings or re-register on the network (#4636##)
Calls are reset after 1 beep	Conflict with redirect settings or blacklist	Verification USSD-code #62#, #67#
No incoming calls, but outgoing calls are working	Malfunction SIM-card	Replacement SIM-map
The problem only appears in certain places.	Poor coverage of the MTS network	Manual network selection or use of Wi-Fi Calling

5. Features of VoLTE and Wi-Fi Calling

Modern Xiaomi smartphones support VoLTE technology (voice through the phone) 4G) These features can conflict with traditional voice calls, especially if they are not configured correctly.

VoLTE sometimes causes problems with incoming calls, for example, if the MTS network is unstable in your area, calls can get lost when switching between the two. 4G and 3G. To check:

Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → VoLTE.
Turn off the option and restart the phone.
Ask someone to call you – if the call went through, the problem was VoLTE.

Wi-Fi Calling can also interfere. If this feature is enabled but the Wi-Fi network is unstable, incoming calls may not reach. Turn it off in the same settings. SIM-map.

Another nuance is the settings. IMS (IP Multimedia Subsystem, which is responsible for voice data transmission. MIUI These settings are reset after the update:

Call the phone app: ##86583##


Select Disable VoLTE (if available).




Reset the device.

💡

If the quality of the connection has deteriorated after the VoLTE shutdown, try turning it back on and manually selecting the network. 3G Sometimes it helps stabilize incoming calls.

6.Problems with SIM-Card: Blocking, Outdated Standards

Old or damaged SIM-The card may cause problems with incoming calls, and the operator of the MTS periodically updates the security standards, and if your SIM Released more than 5-7 years ago, it may not support modern authentication protocols.

How to check:

🆔 Look at the self. SIM-If it is a Mini-SIM (large) or older than 2016, it should be replaced.
🔄 Try inserting it into another phone. If the problem persists, it's your fault. SIM.
📞 Contact the MTS salon with a request to replace SIM new (free of charge).

Another thing is the blockage. SIM-- Cards due to debt or suspicious activity:

Type *111# and select Balance & Services. Make sure there is no debt.
Try calling the short number 0890 (MTS support service), if the call does not pass, the card is blocked.

If SIM-The map is fine, but the problem remains, try to link it to another phone number in the MTS personal account. Sometimes this helps to reset the "stuck" routing settings.

Alternative solutions: from VPN preset

If none of the above has helped, try non-standard methods:

🌐 Turn it off. VPN (If you use it, some of them. VPN-Services block incoming calls.
🔄 Reset network settings: Settings → System system → Resetting settings → Resetting mobile network settings.
📱 Turn on flight mode for 30 seconds, then turn it off. That sometimes resets the session on the network.
🔧 Update. IMEI (Only for advanced users! IMEI The operator can block incoming calls.

The last measure is a complete reset (Settings) → The phone. → Reset settings. Be sure to back up the data before you do that:

Don’t restore settings from backup – set your phone up as new.
Put it in. SIM-map and check incoming calls before installing applications.
If the problem has disappeared, one of the previously installed applications (most often these are antiviruses or optimizers) is to blame.

💡

If resetting helped, but the problem returned after data recovery, it was the software's fault. Install apps one at a time and test incoming calls after each installation.

FAQ: Frequent questions about the problem

Can apps block incoming calls to Xiaomi?

Yes, some applications (antiviruses, optimizers, spam blockers) can interfere with the operation of telephony. DU Battery Saver is known for these bugs. Try to remove suspicious programs or check their settings.

Why is it that the problem only appears with MTS, and with other operators everything is fine?

This is due to the peculiarities of routing calls at MTS. Perhaps in your region the operator uses outdated protocols that conflict with the settings of Xiaomi, and MTS more often than other operators blocks suspicious activity (for example, if your number was marked as spam).

Could the virus be causing the problem?

In theory, it's very rare, but in practice, virus blocking calls usually masquerades as system applications and requires administrator rights. If you haven't installed software from unverified sources, the virus is unlikely. To check, scan your phone through Malwarebytes or Dr.Web.

What if the MTS support says that everything is okay?

In this case: Ask for a log of calls from the last day (they should see if the calls reach their server); check if your number is blocked by mistake (sometimes due to spam complaints); if the operator does not make contact, write a complaint to the online feedback form detailing the problem.

Could the problem be related to two-factor authentication (2FA)?

No, 2FA (for example, through SMS) However, if you use apps like Google Authenticator or Authy, they may conflict with system telephony services. Try temporarily disabling those apps and check for calls.