Where is the antenna in the smartphone Xiaomi: diagrams, types and diagnostics

Have you ever wondered why your Xiaomi is worse at catching the network than a friend's smartphone, or why the signal goes missing if you take your phone a certain way? It's all about antennas -- these hidden but critical components that depend on the quality of communication, Wi-Fi and even the quality of communication. GPS. Unlike buttons or connectors, antennas in Redmi smartphones, POCO Mis are not visible to the naked eye, but their location directly affects the user experience.

In this article, we will not only show you where the antennas are in popular Xiaomi models (from the budget Redmi Note to the flagship Xiaomi 14), but also explain how they work, why their placement varies depending on the design of the case, and what to do if you suspect a malfunction. You will learn how to independently check the signal quality, which materials of the case impair reception, and why in smartphones with a metal case antennas are often put on plastic inserts.

This material will be useful for users who want to understand their device better, as well as those who are planning to disassemble the phone for repair or upgrade, and we have collected up-to-date data for 2026, including the layout of antennas in the latest models, and added practical tips for diagnostics.

Anatomy of antennas in Xiaomi smartphones: types and principles of operation

Before you search for antennas in your Xiaomi, it’s important to understand what types of antennas are used in modern smartphones and what each of them is responsible for. Unlike older phones with a single antenna for calling, today there are at least four to five devices, and each performs its function:

• 📶 Main communications antenna (LTE/5G) — It's responsible for mobile Internet and calls, usually the largest and most powerful.
• 📶 Wi-Fi/Bluetooth-antenna – provides wireless communication at short distances.
• 📍 GPS/GLONASS antenna – used for geolocation and navigation.
• 📡 NFC-antenna – required for contactless payments (if supported).
• 🔄 MIMO-antennas (in models with 5G) — Additional antennas to increase data transfer speed.

In Xiaomi smartphones, antennas are usually printed conductors on the motherboard (the so-called “print conductors”). FPC-For example, in models with a metal body (such as Xiaomi Mi 6 or Redmi Note 5), antennas are often placed on plastic inserts in the upper and lower parts of the rear panel, this is done to ensure that the metal does not shield the signal.

Interestingly, the latest flagships (for example, Xiaomi) 13T or POCO F5) manufacturer uses technology LDS-Laser Direct Structuring, where the antenna tracks are laser-painted directly onto the plastic housing, making them more compact and efficient without sacrificing design. 5G (For example, the Redmi Note 12 Pro+) The number of antennas can be as high as 8-10 to ensure stable communication across different bands.

Where exactly are antennas: schemes for popular models

The location of the antennas depends on the model of the smartphone, its design and year of release. Below we have collected diagrams for the most common lines of Xiaomi, Redmi and other products. POCO. Note: on all diagrams, the antennas are indicated in yellow or orange, and their number can vary.

For example, in the Redmi Note 11 Pro+ antennas are arranged as follows:

• 📱 Basic 5G-antenna - upper left part of the back panel (under the plastic insert).
• 📶 Wi-Fi/Bluetooth — bottom right, next to the connector USB-C.
• 📍 GPS — upper central part, next to the camera module.
• 🔄 Additional MIMO-antenna - side frame on the right.

In older models (e.g. Redmi). 4X or Mi A1) The antennas were often placed on the removable back cover, making them easier to diagnose but more vulnerable to fall damage. Today, most antennas are integrated into the body or motherboard, making them difficult to repair.

How to check the work of antennas in Xiaomi: step-by-step instructions

If you notice that your Xiaomi has become worse at catching the network, it is slower to connect to Wi-Fi or lose. GPS-The signal, the problem may be in the antennas, and before you bring the phone to the service, try to diagnose the malfunction yourself:

1. Checking the mobile signal level

Android has an engineering menu where you can see the exact data on the quality of the connection.

1. Open the Phone app.
2. Enter the code: ##4636###.
3. Select the item Phone Information.
4. Look at the network signal (dBm) and ASU. Normal values: 📶 From -70 dB -90 dBm is a good signal. 📵 Below. -100 dBm - weak signal (probable antenna problems).

2. Mobile Internet Speed Test

If the signal is weak but the network is catching, check the speed through services like Speedtest or nPerf.

• 📉 If the speed is lower 10 Mbps in good coverage area 4G/5G, Possible problems with antenna or communication module.
• 🔄 If the speed jumps (high, then breaks), this may indicate poor contact of the antenna with the board.

3. Wi-Fi and Bluetooth check

Run the Wi-Fi test in the WiFi Analyzer app (available on Google Play).

• 📶 Signal weaker -70 dBm near the router - possible malfunction of the Wi-Fi antenna.
• 🔌 Bluetooth devices (earphones, fitness bracelets) are constantly turned off - check the Bluetooth antenna.

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If the signal goes missing when holding the phone in a certain way (for example, clamping the bottom end), it is likely that the antenna in this area is damaged.

Typical causes of antenna failure and how to avoid them

The antennas in Xiaomi smartphones rarely fail on their own, usually due to external influences or repair errors.

• 💥 Strikes and falls – even if the body is intact, the antenna tracks on the board can crack.
• 💧 Moisture ingestion - oxidation of antenna contacts leads to signal deterioration.
• 🔧 Incorrect disassembly – when replacing the battery or screen, it is easy to damage the antenna plumes.
• 📡 Signal shielding – metal covers or magnetic holders can block communication.
• ⚡ Overheating – if the phone overheats frequently, it can damage the soldering of the antennas.

Especially vulnerable antennas in models with removable back cover (for example, Redmi). 3S or Mi A2). With frequent removal of the cover, antenna contacts can move away from the board, resulting in complete loss of signal or its instability, POCO X4 Pro) antennas are integrated into the housing, so they are more difficult to damage, but repair is more expensive.

⚠️ Note: If the signal is lost after replacing the screen or battery, most likely the master forgot to connect the antenna plumes back. In this case, do not try to disassemble the phone yourself - you better return to the service.

Another common problem is the oxidation of contacts after moisture is injected, and even if the phone hasn't sunk, condensation inside the case can lead to corrosion, in which case it can be done by cleaning with alcohol (if you're confident in your abilities) or by professional ultrasound cleaning in the service.

Can you improve signal reception in Xiaomi: practical tips

If your Xiaomi antennas are good, but the signal is still weak, try these methods to improve reception:

• 📶 Use covers without metal elements – they do not shield the signal.
• 🔋 Don’t hold your phone at the bottom end – there’s often a main antenna.
• 📡 Include the "only" mode in the settings 4G" (if 5G runaway).
• 🔄 Update your firmware – sometimes communication problems are solved software-based.
• 📍 Use external antennas (for stationary use).

Xiaomi has hidden options in its settings to optimize communication, such as forcefully selecting a network. 4G instead 5G (If the latter is not working smoothly, follow:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Tap the network type and install only 4G (LTE).

For models with Wi-Fi 6 support (e.g. Xiaomi) 12T or POCO F4) You can turn on Wi-Fi mode.+, which automatically switches between 2.4 GHz and 5 GHz for better stability. → Wi-Fi → Additionally.

⚠️ Warning: Some "tips" from the Internet (e.g., foil-painting the inside of the lid) can degrade the signal or damage antennas.

What to do if the antenna is not working: repair or replacement

If the diagnosis shows that the antenna is indeed faulty, you have a few options:

1. The most reliable, but also the most expensive way to contact Xiaomi service center is official repairs guarantee quality, but can take up to 2-3 weeks.
2. Replace the antenna yourself – suitable only for experienced users, you will need a soldering iron, a set of screwdrivers and a new antenna (you can order on AliExpress or in specialty stores).

The cost of repair depends on the model and type of antenna:

• 📶 Replacement of the main communication antenna: 1500-3000 rubles.
• 📶 Repairs Wi-Fi/Bluetooth-antennae: 1000–2000 ruble.
• 📍 Recovery GPS-antennas: 2000-3500 rubles (often requires soldering).

If you decide to repair yourself, here’s what you’ll need:

For models with a non-removable back cover (for example, Xiaomi) 11T) Disassembly becomes more complicated, you have to unplug the screen, which can damage the plumes.

If the antenna isn't completely broken, but the contact has just gone, sometimes it helps to sell the slug.

1. Carefully remove the back cover (if necessary, warm it up with a hairdryer).
2. Find the antenna plume (usually connected to the motherboard next to the connector for the SIM-map).
3. Check if the contacts are gone. If so, sell them back.
4. Test the signal after assembly.

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If the signal has not recovered after self-repair, do not try to re-disassemble the phone - contact the service. Repeated manipulations can aggravate the problem.

Myths and misconceptions about antennas in Xiaomi smartphones

There are many myths surrounding the antennas of smartphones, and we will examine the most popular ones in relation to Xiaomi:

• 📵 Myth 1: “The more antennas, the better the signal” Reality: The number of antennas is important to support different standards (e.g., the more antennas, the better the signal, 5G MIMO), But the signal quality is also affected by their location, the power of the communication module, and even the firmware of the phone, POCO X3 The Pro has fewer antennas than the Xiaomi 12 Pro, but can still show a more stable signal in some conditions.
• 🛡️ Myth 2: “Metal case always degrades signal” Reality: Modern smartphones (such as Xiaomi Mi 11) use special dielectric inserts and shielding technologies that minimize signal loss. Problems only arise with an illiterate design (like the older iPhone 4, where the antenna was on a metal frame).
• 🔋 Myth 3: "If the battery is bloated, the antennas are definitely damaged" Reality: A bloated battery can press on the antenna plumes, but the antennas themselves often remain intact.
• 📡 Myth 4: "External antennas can improve the signal in a smartphone" Reality: For stationary use (like in a car), external antennas work, but connecting them to a smartphone without a special adapter is impossible.

Another common misconception is that flashing can fix a bad signal, and in fact, the firmware only affects the software processing of the signal (like the algorithms for switching between networks), not the physical state of the antennas, and if the problem is hardware, no updates will help.

FAQ: Frequent questions about antennas in Xiaomi