Why MegaFon is bad at catching on Xiaomi phone

Owners of smartphones Xiaomi, Redmi and Poco often face a situation when after another system update or location change, the operator MegaFon begins to work unstable, the speed of mobile Internet drops to EDGE values, and calls are interrupted, which causes natural irritation. The problem is rarely the physical breakdown of the antenna, most often it is a matter of software conflicts or incorrect network settings.

MIUI and HyperOS’ new shell algorithms aggressively optimize power consumption, which can lead to premature shutdown of the communications module in the background, and changes in the operator’s infrastructure that transfers subscribers to new frequencies not always supported by old firmware configurations also influence the changes in the operator’s infrastructure, which are not always supported by old firmware configurations. In this article, we will discuss the causes of unstable signal in detail and offer proven methods for eliminating them.

Before you take your device to the service center, you should try software setup that returns a stable 4G/LTE connection 90% of the time. We’ll look at manual access point creation, network resets, and hidden engineering menus available on Chinese brand devices, and understanding these processes will allow you to diagnose and fix the problem yourself.

Diagnostics of the problem: operator coverage or failure in the smartphone

The first step should always be an objective assessment of the situation. You should not immediately blame Xiaomi firmware if you are planning work on the MegaFon towers in your area. Check the signal level on other devices running on the same operator's SIM card. If the problem is only seen on your phone, then it is the reception settings or data transmission.

If the phone is constantly switching between 3G, H+ and 4G, it indicates that the device cannot lock in a stable frequency, often because the smartphone is trying to “grab” a higher priority far tower, ignoring the nearer, but busier one.

⚠️ Attention: If the network indicator is completely lost or a crossed-out circle is burning, try to remove the SIM card and wipe the contacts with a pin. Contact oxidation is a common cause of network loss after moisture or long use.

There is also the possibility of frequency conflict. Operators are constantly upgrading equipment to introduce new band bands. If your phone is set to work only with old frequencies, and the nearest tower has already moved to new broadcast standards, communication will be absent or extremely slow.

Manually configuring the APN access point for MegaFon

The most common reason for slow internet is an incorrect APN hotspot. Automatic settings that come into SMS often contain outdated settings or conflict with the current version of Android. Manually creating a profile allows you to prescribe current addresses of gateways and ports.

To enter the settings menu, go on the Settings path → SIM-maps and mobile networks → Choose MegaFon SIM Card → Access points (APN). You have to create a new dot by clicking on the plus in the top right corner of the screen, and it's important to enter all the data precisely, because one extra letter can block access to the network.

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Before making changes, take a screenshot of your current settings or write them down, which will quickly return everything as it was if the new settings do not work.

In the window that opens, fill in the fields as follows: in the "Name" field, specify Megafon, and in the "APN" field, enter the Internet. The remaining fields, such as username and password, can be left empty unless the operator requires otherwise. After saving, remember to activate the created point by placing a marker next to it.

After you have set up, be sure to turn on your flight mode for 10-15 seconds, and then turn it off. This action will force the device to re-register the network with new parameters. If the Internet does not appear, check if the mobile data transmission is activated in the notification curtain.

Forced choice of network type and modes

Modern Xiaomi smartphones are default 5G/4G/3G/2G (auto) mode, which is convenient, but in areas of uncertain reception, the phone can spend a lot of time searching for a faster but unavailable signal, instead of keeping a stable 4G. Forced range restriction often solves the problem of "jumping" the network.

To change the priority of networks, go to the Settings menu. → SIM-maps and mobile networks → Preferred type of network. Select the option 4G or prefer 4G. This will prevent the phone from switching to overloaded or slow. 3G, even if 4G get weaker.

You can use the engineering menu for a deeper setup, although newer versions of MIUI have limited access to it. Try entering the dialer code ##4636##. If the menu opens, select Phone Information and select LTE Only under "Install preferred network type."

⚠️ Attention: Regime LTE Only can cause incoming calls to stop passing if the operator does not have VoLTE technology configured. Use this mode only to distribute the Internet or if you know that VoLTE is active.

An alternative is to use a hidden menu through the Engineering Menu (required to be installed via ADB or special rights), where you can turn off specific Band frequencies that are not used or interfere with your region, but for most users, standard settings in the system menu are enough.

Impact of MIUI and HyperOS Updates on Communication Module

Often users notice a deterioration in communication after an operating system update. New versions of the shells from Xiaomi contain modified modem drivers and algorithms for working with antennas. Sometimes developers make mistakes that lead to a decrease in the sensitivity of reception.

If the problems started right after the update, it makes sense to check for more recent patches. Often Xiaomi will release corrective updates (e.g., from V14.0.3 to V14.0.5) that fix critical communication bugs. Go to Settings → About phone and click on the system version to check for updates.

In some cases, resetting your network settings to factory settings helps.This action won't delete your personal files, photos or contacts, but will clear all stored Wi-Fi passwords and Bluetooth settings.The path to function: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.

It’s also worth considering that global firmware versions (Global) may have different frequency settings from Chinese ones (China).If you’ve re-flashed the device or bought a version for another market, make sure the band band bands supported match those used by MegaFon in your region (usually B3, B7, B20, B38).

Physical factors and condition SIM-map

Older Mini-SIM cards, trimmed to Nano-SIM, often work unstable due to a violation of the geometry of contacts or thickness. Operators recommend replacing SIM cards older than 5-7 years, as the contact material degrades.

Check if the sim card tray is tight. In Xiaomi moisture-protected models, the tray has a sealer that can wear out or deform over time, poor contact. Try gently correcting the sim card in the tray or rubbing the chip with alcohol.

Another important aspect is the case: Metallic cases or magnetic case can shield the signal of antennas, which in Xiaomi smartphones are often located at the top and bottom of the case.

Network resets and radical methods

If tweaks fails, it's left to reset the network completely, a deeper operation than just reconnecting, which clears the cache of network services and resets tower priorities, forcing the phone to re-build the table of available stations.

Reset via menu: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth → Reset. After rebooting, the phone can search for the network for a few minutes.

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Resetting network settings is a secure procedure that does not affect personal data, but deletes Wi-Fi and Bluetooth device passwords.

In extreme cases, when nothing works, you may need to completely reset to factory settings (Hard Reset).Be sure to back up all data to the cloud or computer before that, this will eliminate the impact of third-party applications that can block the modem.

There is also a method of flashing the modem, but it requires root rights and deep knowledge in Android. For the average user, this method is not recommended, since an error can lead to complete loss of communication (IMEI null), which can only be restored in the service center.