Owners of Xiaomi and Redmi smartphones who switched to the tariffs of the operator LUGACOM often face a situation where outgoing messages are not sent. SMSC (Short Message Service Center, as defined in the device settings. MIUI HyperOS sometimes doesn’t update this setting automatically when you install a new one. SIM-card, which leads to technical failures in the standard application "Messages».
The problem is solved pretty quickly if you know where to look for hidden engineering menus or how to enter correctly. USSD-Unlike other operators, LUGACOM uses a specific gateway numbering that may differ from the standards of other cellular networks. If your phone does not pick up the settings automatically, you will have to intervene manually to restore full communication.
In this article, we will discuss in detail all the available ways to change the number of the SMS center, from simple commands to deep system settings through the engineering menu, you will learn how to check the current delivery status and what precautions should be taken when working with the system parameters of Android.
Why you need to change the settings of the SMS center LUGACOM
The message center address acts as the post office through which all your text messages go. When you send a message, it first goes to the operator's server, which identifies the recipient and delivers the text. If the Xiaomi phone has the wrong address or the address of another operator in its memory, the phone simply does not know where to send the data for routing.
A frequent cause of failure is the use of SIM-A card that was previously used in a device of another brand or was moved from an old phone, in which case the network profile may conflict with the current settings. MIUI. The operator LUGACOM requires the precise indication of the gateway for the correct operation of not only the usual SMS, Service notifications from banks and government agencies.
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Before changing any network settings, save important dialogs to the cloud or computer, as resetting your message settings may result in their removal.
Ignoring this problem leads to a queue of outgoing messages that the phone will unsuccessfully try to send every time a signal appears, which in turn can speed up battery drain and put unnecessary strain on the radio module of the Redmi smartphone.
Current status check and diagnosis
Before making changes, make sure the problem lies in the messaging center number, not the lack of balance or network coverage. Xiaomi smartphones have a built-in status check feature. SIM-A card that displays the current address SMSC.
To diagnose, open the standard Messages app, click on the three dots in the top right corner, and select Settings. Under "Additional" or "Settings." SIM-The map often displays the current center number, but this method does not work on all versions. MIUI, Therefore, a more reliable method is the use of engineering code.
- 📱 Enter the code ##4636## in the Phone app to enter the test menu.
- 📡 Select the "Phone Information" option).
- 🔍 Scroll down to the field «SMSC» Click on “Refresh” to see the current number.
If the SMSC field is empty or contains a number that does not correspond to the LUGACOM region, it is necessary to replace it. Please note that in some firmware the number may appear in PDU format (hexadecimal code), rather than in a regular telephone format.
Change of number through USSD-commands and menus
The easiest and safest way to change settings is to use USSD-LUGACOM provides the ability to automatically configure Internet settings and messages. However, if the automatic setting does not come, you can try to reset the network profile.
In the smartphone settings menu go to the section «SIM-Select an active LUGACOM SIM card, and there may be a button "Restore default settings" or "Reset settings" APN». Although this is primarily the case with mobile internet, in some cases the system re-queries the settings. SMS-center.
☑️ Checklist before manual adjustment
If the menu does not offer reset options, try manually entering the service activation code. For LUGACOM, standard setting codes often work, but these can vary depending on the year of release of the SIM card. Enter the command in dialer and press the call button.
⚠️ Attention: Not all USSD-codes are used in roaming or when blocked PIN-- SIM card code. SIM-Active and unlocked before entering commands.
Manual installation through the Android engineering menu
If simple methods don’t work, you’ll need to use “heavy artillery” — an Android engineering menu available on all Xiaomi devices — which allows you to directly edit the SMSC setting in the radio module’s memory.
Open the Phone app and dial ##4636##. If the menu doesn't open, your firmware version may be blocking that access, so you can try installing the Engineering Mode app from the Play Market store, although newer versions of Android may not have the necessary permissions.
From the menu that opens, select Phone Information 1 for the first SIM card. Find the SMSC field. Enter the international messaging center number in the LUGACOM message center. The number usually starts with the plus and country code.
+380502220000Once you enter the number, be sure to click Update or Set to save the changes. If the button is inactive, try switching your preferred network type to LTE only and then returning it back — this sometimes reactivates the input field.
What if the SMSC field is grey and not edited?
Use of third-party applications and ADB
In cases where the standard menu of Xiaomi blocks the change of system parameters, specialized utilities come to the rescue. the application “Force LTE Only (4G/5G)” or its analogues allow you to access hidden functions of the radio module that are not displayed in the standard interface.
A more advanced method is USB debugging and the Android Debug Bridge (ADB) console, which requires connecting the smartphone to the computer and having drivers installed, and allows you to send commands directly to the Android system without the interface limitations.
To change the SMSC through ADB, the following command is used:
adb shell service call isms 7 i32 0 i32 2 i32 0 i16 0 i32 0 i16 0 s16 "+380502220000"This command compels the new message center number to be written into the corresponding memory slot. Note that the command syntax may vary depending on the Android version and the Qualcomm or MediaTek processor model on which your Redmi is based.
⚠️ Attention: Working with ADB An error in the syntax of the command can lead to unstable operation of the communication module or complete disappearance of the network.
Table of setting parameters for LUGACOM
For convenience, the following is a summary table with the main parameters that may be required for manual adjustment, which is relevant for most carrier coverage regions.
| Parameter | Meaning | Note |
|---|---|---|
| SMSC number (Primary) | +380502220000 | Used in an international format |
| SMSC number (Alternative) | +380502229999 | Carved lock in case of failure of the main lock |
| APN (Internet) | internet | For mobile Internet |
| Type of authentication | PAP or CHAP | Usually selected automatically. |
Use this data when filling in the fields in the Access Points (APN) menu and SMS settings. Incorrectly specifying the format of the number (for example, without a plus or with an eight instead of a country code) is the most common mistake of users.
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Key point: The number of the message center should always be entered in an international format, starting with the + symbol and the country code (for LUGACOM it is +380).
Possible errors and ways to eliminate them
Even after you set up correctly, you may encounter delivery errors, often writing "Not Delivered" or simply hanging in the "Send" status, which may be due to the message app's cache or version conflict.
Try clearing the Messages cache. To do this, go to Settings → Apps → All Apps, find Messages, and select Clear Cache. Don't confuse it with Clear Data, as this will delete the entire correspondence history.
- 🔄 Reboot your smartphone after making changes to the SMSC.
- ✈️ Turn on and off "Flight Mode" to re-register on the network.
- 🗑️ Remove old, unsent messages from the queue.
If the problem persists, it is possible that the lock is on the operator's side due to suspicious activity or technical work, in which case the best solution is to call the LUGACOM support service to check the status of the number.