MIMO on your phone: How Wi-Fi technology with multiple antennas speeds up your internet

Have you ever noticed that your smartphone has better Wi-Fi reception than your old phone, even though you have the same router? Or why do new flagships boast about Wi-Fi support in their specifications? MIMO 4×4, and budget models - only 2×2 MIMOIt's all about technology. MIMO (Multiple Input Multiple Output), which dramatically improves wireless connection quality. But how exactly does it work in a phone, and is it worth the extra cost for additional antennas?

In this article we will figure out what it is Wi-Fi MIMO At the smartphone level, how the number of antennas (2x2, 4x4) affects connection speed and stability, and why even with the most powerful router your phone can experience slow internet. We'll also find out why MIMO differs from MU-MIMO, and why in 2026 no modern gadget will be able to do without this technology.

What is MIMO in a phone in simple terms?

MIMO (eng. Multiple Input Multiple Output) is a technology that allows a device (in our case, a smartphone) to simultaneously transmit and receive data via multiple antennas. Imagine that instead of one narrow data path, you now have several traffic lanes, and traffic is distributed between them. The more antennas, the wider the "road" and the higher the throughput.

On the phone MIMO it works like this:

• 📡 The transmitting party (router) sends a signal not in one stream, but in several parallel streams (according to the number of antennas).
• 📱 Receiving side (smartphone) catches these streams simultaneously, and not one after another, as in older Wi-Fi standards.
• ⚡ Result: data transfer speed grows significantly, and delays (pings) are reduced.

For example, if your router supports 4×4 MIMO, and the phone is only 2×2 MIMO, then the actual speed will be limited by the capabilities of the smartphone. This is why flagship manufacturers (for example, Samsung Galaxy S24 or iPhone 15 Pro) install 4 antennas to utilize the full potential of modern routers.

2×2 MIMO vs. 4×4 MIMO: What's the Difference and Which is Better for Your Phone?

The main difference is the number of antennas and data streams the device can handle. Let's compare:

In practice, the difference is noticeable if:

• 🏠 You are connected to the router with 4×4 MIMO (For example, ASUS RT-AX88U or TP-Link Archer AX6000).
• 📶 There are many devices on your network (smart home, laptops, TVs), and the router uses MU-MIMO to distribute traffic.
• 🎮 You're playing an online game or watching 4K video where low latency is important.

However, if your router is older than 2018 or only supports 2×2 MIMO, overpay for a smartphone with 4×4 MIMO there is no point - he will not reveal his potential.

How MIMO affects internet speed on a phone

Theoretically, doubling the antennas (with 2×2 to 4×4) should double the speed. But in practice, things are more complicated. Here are the key factors:

1. Wi-Fi standard:
   • 🔄 Wi-Fi 5 (802.11ac): 4×4 MIMO gives up to 1733 Mbps, 2×2 — up to 867 Mbit/s.
   • 🚀 Wi-Fi 6 (802.11ax): even 2×2 MIMO can deliver up to 1200 Mbps thanks to better signal processing.

Channels and bandwidth:

Speed ​​is affected not only by MIMO, but also by channel width (20/40/80/160 MHz). For example, 4×4 MIMO on the 160 MHz channel Wi-Fi 6 can deliver up to 2400 Mbps, but such conditions are rare in home networks.

Interference and distance:

4×4 MIMO It copes better with interference and works more reliably at a large distance from the router thanks to technology beamforming (directional signal).

Real tests show:

• 📊 In ideal conditions (router Wi-Fi 6, channel 160 MHz, no interference) the difference between 2×2 And 4×4 can reach 30–50% in speed.
• 🏢 In an apartment building with dozens of networks, the difference is reduced to 10–20%, But 4×4 MIMO provides a more stable ping.

MIMO vs. MU-MIMO: Why Both Technologies Are Important in a Phone

Often confused MIMO And MU-MIMO (Multi-User MIMO). The difference is fundamental:

• 🔄 MIMO — data exchange between one device and router via several antennas.
• 👥 MU-MIMO — the router communicates with the router simultaneously several devices using MIMO for each.

Example: if you have a smartphone connected at home (2×2 MIMO), laptop (2×2 MIMO) and TV (2×2 MIMO), then the router with MU-MIMO can transmit data to all three parallel, rather than one at a time. This reduces latency and increases overall network throughput.

However, there are some nuances:

⚠️ Attention: MU-MIMO only works in one direction at a time (either from the router to the devices, or vice versa). Full Duplex MU-MIMO (simultaneous two-way transmission) is not yet implemented in mass-market devices.

For phone MU-MIMO important if:

• 📱 There are many devices on your network (smartphones, tablets, smart speakers).
• 🎮 You are playing an online game where minimal latency is critical.
• 📺 Watch videos on your phone and download files on your laptop at the same time.

How to check if your router supports MU-MIMO?

Go to your router's web interface (usually at 192.168.1.1) and find the "Wireless" or "Wi-Fi" section. Look for mentions MU-MIMO or Multi-User MIMOIf this option is not available, your router does not support the technology.

How to enable MIMO on your phone (and whether you need to do it)

Good news: MIMO is turned on automatically, if both your phone and router support the technology. You don't need to configure anything manually. However, there are a few things to check:

Make sure Wi-Fi is enabled in your phone's settings|Check that your router is running in 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6) mode|Disable power-saving mode for Wi-Fi (in battery settings)|Update your router's firmware to the latest version-->

If the speed is slower than expected, try:

1. Switch the Wi-Fi channel in the router settings (for example, from automatic to fixed 40 MHz or 80 MHz).
2. Turn on beamforming (directional signal) in the router settings, if supported.
3. Disable old devices that work Wi-Fi 4 (802.11n) - they can slow down the entire network.

⚠️ Attention: Some manufacturers (eg Xiaomi or Realme) in budget phone models they indicate support 4×4 MIMO, but in practice it only works 2×2Check real tests before buying!

Which phones will support 4x4 MIMO in 2026?

Technology 4×4 MIMO remains the preserve of flagships and some mid-range models. Here are some current examples:

Among budget and mid-budget models 4×4 MIMO is rare. For example, Samsung Galaxy A54 or Redmi Note 13 Pro+ limited 2×2 MIMO, which is quite sufficient for most tasks.

If you need a smartphone with 4×4 MIMO, pay attention to:

• 📋 Specifications: look for mention 4×4 MIMO or 4T4R (4 transmitting, 4 receiving antennas).
• 🔍 Tests: The actual speed may differ from the stated one (for example, due to a weak processor).
• 🌍 Regional differences: some models (eg Xiaomi for China) may have limited Wi-Fi.

The Future of MIMO: What to Expect in Wi-Fi 7 and New Smartphones

MIMO technology continues to evolve. In the standard Wi-Fi 7 (802.11be), which begins to appear in 2026, the following innovations are expected:

• 🔢 16×16 MIMO: theoretically up to 16 antennas, but smartphones implement no more 4×4 (due to size and power consumption limitations).
• 🔄 Multi-Link Operation (MLO): The device can simultaneously use multiple channels on different frequencies (2.4 GHz, 5 GHz, 6 GHz).
• ⚡ Speed ​​up to 40 Gbps: of course, in real conditions it will be lower, but even 5–10 Gbps is a breakthrough.

The first smartphones with Wi-Fi 7 have already been announced (for example, OnePlus 12 for some markets), but mass distribution of the technology is not expected before 2026. For now 4×4 MIMO paired with Wi-Fi 6/6E remains the optimal solution for most users.

⚠️ Attention: Wi-Fi 7 support details may vary depending on your region and device firmware. Please check the manufacturer's website for the latest information.

FAQ: Frequently asked questions about MIMO in phones

❓ My phone supports 4x4 MIMO, but the speed is slow. What's the problem?

There may be several reasons:

• 📡 The router does not support 4×4 MIMO or works in an outdated standard (for example, Wi-Fi 4).
• 📶 The signal is weakened due to walls, interference from neighboring networks, or a large distance.
• ⚙️ Power saving mode for Wi-Fi is enabled in the phone settings.

Try connecting to the router from a distance of 1–2 meters and check the speed again. If the problem persists, update the router firmware.

❓ Does MIMO affect battery life?

Yes, but only slightly. Additional antennas (4×4 MIMO instead of 2×2) increase battery consumption by 1–3% When using Wi-Fi actively, the difference is unnoticeable in standby mode. If battery life is critical, turn off Wi-Fi when not in use.

❓ Is there any way to improve MIMO on a 2x2 phone?

Unfortunately, upgrading antennas is not possible, but the current configuration can be optimized:

• 🔄 Use a router with beamforming - it will “aim” the signal at your phone.
• 📶 Switch to a less crowded channel (for example, 5 GHz instead of 2.4 GHz).
• 🔌 Connect via cable (if your phone supports it) USB-Ethernet adapter).

❓ Does iPhone 12/13/14 support 4x4 MIMO technology?

Yes, all models iPhone starting from iPhone 11 support 4×4 MIMO in standard Wi-Fi 6However, in iPhone SE (2022) and budget models may be limited to 2×2 — check the specifications.

❓ Do I need to buy a phone with 4x4 MIMO if I have regular home internet?

Depends on your tariff and router:

• 🏠 If your internet is up to 100–300 Mbps, and the router is older than 2020 - 2×2 MIMO quite enough.
• 🚀 If you have a tariff 500 Mbps+ and a router with Wi-Fi 6/6E, That 4×4 MIMO will help unlock the network's potential.

For most users the difference is not critical, but if you often download large files or play online - 4×4 MIMO will be a plus.