Smartphone Wi-Fi: What frequency does your phone use and how does it affect speed?

Have you ever wondered why your phone's Wi-Fi is sometimes spotty, sometimes barely noticeable? Or why the signal is stable in some rooms, while constantly dropping out in others? It's not just the router—it all depends on Wi-Fi frequencies, which your smartphone uses. Modern phones support several bands: 2.4 GHz, 5 GHz, and new models - even 6 GHzBut how do you know which frequency is active right now? And most importantly, how do you choose the optimal one to speed up your internet?

In this article we will discuss:

• 📱 What Wi-Fi frequencies do smartphones of different brands support? (iPhone, Samsung, Xiaomi, Google Pixel etc.)
• 🔍 How to check your current connection frequency Android And iOS (including without root rights)
• ⚡ What's the difference between 2.4 GHz, 5 GHz, and 6 GHz—the pros and cons of each band
• ⚙️ How to manually switch to the desired frequency (if your phone allows it)
• 📉 Why your phone might get stuck on a slow frequency and how to fix it

It doesn't matter if you're using a flagship iPhone 15 Pro or budget Redmi Note 12 — After reading this, you'll be able to optimize your Wi-Fi connection and get the most out of your internet.

1. What Wi-Fi frequencies do modern smartphones support?

All modern phones operate in at least two ranges:

• 📶 2.4 GHz — the most common frequency, supported by all devices without exception. Ideal for long distances, but suffers from interference (microwaves, neighboring networks).
• 🚀 5 GHz — a faster and more stable range, but with a smaller coverage area. Supported by all smartphones released after 2015.
• 🆕 6 GHz — the latest standard Wi-Fi 6E, available only in flagships (for example, iPhone 15, Samsung Galaxy S23 Ultra, Google Pixel 7 Pro). Promises minimal interference and record-breaking speed, but requires a compatible router.

Here's how things stand with frequency support for popular brands:

Important: Even if your phone supports 6 GHz, your router must also be compatible with Wi-Fi 6E (for example, ASUS RT-AX89X or TP-Link Archer AXE75). Otherwise, the smartphone will automatically switch to 5 GHz or 2.4 GHz.

⚠️ Attention: Some budget models (for example, Redmi 9A or Samsung Galaxy A03) may only support 2.4 GHz. Before purchasing, check the specifications on the manufacturer's official website.

2. How can I find out what frequency my phone's Wi-Fi operates on?

Most users don't even realize their phone can connect to different frequencies. Luckily, checking this is easy—and it doesn't require root access or special software.

📱 On Android

The easiest way is to use built-in tools:

1. Open Settings → Wi-Fi.
2. Tap on the name of your network (not the switch!).
3. Look at the line Frequency or SpeedIf you see 5 GHz or 6 GHz - Everything is fine. Unless 2.4 GHz - your phone is using the slowest range.

If there is no frequency information in the settings, use free applications:

• 🔧 WiFi Analyzer (shows all networks around and their frequencies)
• 📊 Network Signal Info (detailed information about the current connection)
• 🛠️ Fing (scans the network and determines the range)

🍎 On iPhone

Apple doesn't show Wi-Fi frequency in the default settings, but there is a workaround:

1. Install the application AirPort Utility (official from Apple).
2. Open it, go to the tab Wi-Fi Scan and start scanning.
3. In the results, find your network in the column Band the range will be specified (2.4 GHz or 5 GHz).

For iPhone 15 and newer with support Wi-Fi 6E you can use the app Network Analyzer, which also recognizes 6 GHz.

3. 2.4GHz vs 5GHz vs 6GHz: Which Band is Better for Your Phone?

Each frequency has its pros and cons. Let's figure out when to use each range.

📶 2.4 GHz: Pros and Cons

• ✅ Long range — the signal passes through walls and ceilings better than 5/6 GHz.
• ✅ Universal compatibility — works even with old routers and devices (smart bulbs, printers).
• ❌ Low speed — maximum ~150–300 Mbit/s (in reality it is often less due to interference).
• ❌ Congestion — in apartment buildings, dozens of networks operate on this frequency, which creates interference.

🚀 5 GHz: Pros and Cons

• ✅ High speed — up to 1–2 Gbit/s (depending on the Wi-Fi standard).
• ✅ Less interference - fewer networks operate on this frequency.
• ❌ Shorter range — the signal passes worse through obstacles.
• ❌ Not all devices support — older gadgets (for example, some smart plugs) may not see this network.

🆕 6 GHz (Wi-Fi 6E): Pros and Cons

• ✅ Record speed — up to 3–5 Gbps under ideal conditions.
• ✅ Minimal interference — the range is almost free (few devices use it yet).
• ❌ Very short range — the signal “breaks through” only 1–2 walls.
• ❌ Requires modern equipment - both the phone and the router must support Wi-Fi 6E.

Which range should I choose?

• 🏠 For a house with thick walls → 5 GHz (if the router is nearby) or 2.4 GHz (if far away).
• 🏢 In an office with a large number of devices → 5 GHz or 6 GHz (if supported).
• 🎮 For online gaming or 4K streaming → 5 GHz (lower ping) or 6 GHz (if available).
• 🌐 For smart home (IoT devices) → 2.4 GHz (most sensors work only on it).

4. Why can't my phone connect to 5GHz or 6GHz?

You've configured your router for 5 GHz, but your phone is still stuck on 2.4 GHz? Or isn't even detecting the new network? There could be several reasons:

🔌 Problems with router settings

• 🔄 The 5/6 GHz band is disabled - check the router settings (section Wi-Fi → Frequency Settings).
• 🔒 Hidden network (SSID) - Some phones do not see hidden networks on 5 GHz.
• 📶 Channel width - if the router is set 80 MHz, and the phone only supports 40 MHz, the connection may not work.

📱 Smartphone problems

• 🔄 Outdated firmware — update Android or iOS to the latest version.
• 🛠️ Manufacturer's limitations - some Chinese phones (for example, Xiaomi for the Russian market) can artificially block 5 GHz.
• 🔋 Power saving mode - On some phones it forcibly switches Wi-Fi to 2.4 GHz.

🌍 Regional restrictions

In some countries (for example, in Russia until 2023), the 6 GHz band was banned for civilian use. The restrictions have now been lifted, but:

• ⚠️ Older routers may not support 6 GHz even after a firmware update.
• ⚠️ Some phones (especially those brought from abroad) may have regional locks.

⚠️ Attention: If your phone doesn't see 5 GHz, check if the router mode is enabled. 802.11n only (Sometimes it conflicts with some devices). Try switching to 802.11ac or 802.11ax.

Check if 5 GHz is enabled in your router settings|

Update your phone and router firmware|

Try manually specifying a channel (e.g. 36 or 44) instead Auto|

Turn off power saving mode on your phone|

Restart your router and phone-->

5. How to manually select a Wi-Fi frequency on your phone?

Unfortunately, most smartphones do not allow manual frequency selection — they automatically connect to an available network. But there are a few workarounds:

📱 On Android (with or without root)

If you have root rights, you can use applications like WiFi Band, which forcibly fix the range. Without root access, options are limited:

1. Forget the network in Wi-Fi settings (Settings → Wi-Fi → Tap on network → Forget).
2. Disable 2.4 GHz in your router (leaving only 5 GHz).
3. Reconnect - the phone will select an available range.

🍎 On iPhone

Apple doesn't offer the option to manually select a frequency. The only way is:

1. Disable 2.4 GHz in your router (if you only need 5 GHz).
2. Or vice versa - disable 5 GHz if you want to force the use of 2.4 GHz.

🛠️ Alternative method (for advanced users)

If your router supports guest networks, you can create separate SSIDs for each band:

• 🔄 MyWiFi_2.4GHz — only for 2.4 GHz
• 🚀 MyWiFi_5GHz — only for 5 GHz
• 🆕 MyWiFi_6GHz - only for 6 GHz (if supported)

Then you can manually choose which network to connect to.

⚠️ Attention: Some phones (eg. Xiaomi (on MIUI) may "forget" Wi-Fi settings after the update. If the phone reconnects to 2.4 GHz after the update, repeat the procedure.

6. How to improve Wi-Fi speed on your phone?

If your phone is constantly slowing down on the internet, even when connected to 5 GHz, try these methods:

⚡ Router optimization

• 🔄 Change the channel - use WiFi Analyzerto find the least crowded channel on 5 GHz.
• 📶 Reduce the channel width - If you have a lot of interference, try 40 MHz instead of 80 MHz.
• 🔒 Enable WPA3 — a new encryption standard can speed up connections.

📱 Phone optimization

• 🔄 Turn off Bluetooth - It may interfere with Wi-Fi.
• 🛠️ Reset network settings - go to Settings → System → Reset → Reset Wi-Fi, mobile networks, and Bluetooth.
• 🔋 Turn off power saving mode - it limits the performance of the Wi-Fi module.

🆕 If you have Wi-Fi 6E (6 GHz)

• 📍 Place the router closer to the phone - 6 GHz is very sensitive to distance.
• 🔄 Use Mesh systems (For example, Google Nest WiFi or TP-Link Deco), if you need to cover a large area.

Why might the speed on 5 GHz be lower than on 2.4 GHz?

This seems contradictory, but it happens if:

1. The 5 GHz signal is too weak (for example, you are far from the router).

2. The router is turned on 80 MHz, but there is strong interference on this channel.

3. The phone automatically switches between ranges, choosing the less optimal one.

4. Problems with Wi-Fi module drivers (relevant for some phones on MediaTek).

7. The Future of Wi-Fi in Smartphones: What's in Store?

Technology never stands still, and new standards are already emerging that will radically change the way Wi-Fi works in phones:

• 🆕 Wi-Fi 7 (802.11be) — promises speed up to 40 Gbps and even lower latencies. The first phones with support will appear in 2026–2026 (Samsung Galaxy S25, iPhone 16).
• 📶 Multiband connections — phones will be able to simultaneously use 2.4 GHz, 5 GHz and 6 GHz to increase speed.
• 🤖 AI optimization — routers and phones will automatically select the best range based on an analysis of the environment.

Already today, some flagships (for example, Samsung Galaxy S24 Ultra) support 4K QAM — a technology that increases speed by 20% compared to Wi-Fi 6. And in iPhone 16 support is expected 320 MHz channels at 6 GHz, which will double the throughput.

⚠️ Attention: New standards require not only support from your phone but also a compatible router. If you plan to upgrade your smartphone in the coming years, consider upgrading your router as well.

FAQ: Frequently asked questions about Wi-Fi frequencies on your phone

My phone supports 5GHz, but only connects to 2.4GHz. How can I fix this?

Possible causes and solutions:

1. 5 GHz is disabled in the router - check the settings (Wireless Mode → 5GHz Settings).
2. The phone "remembered" 2.4 GHz as a priority network - forget the network in the settings and connect again.
3. Power saving mode is enabled - please disable it in battery settings.
4. Firmware problem - please update Android/iOS and a router.

If nothing helps, create a separate network for 5 GHz in the router (for example, MyWiFi_5G) and connect to it manually.

How do I know if my phone supports Wi-Fi 6E (6 GHz)?

Check the model specifications on the manufacturer's official website. Typically, 6 GHz is supported by:

• 📱 iPhone 15 and newer
• 📱 Samsung Galaxy S22/S23/S24 (except for base models)
• 📱 Google Pixel 7/8 Pro
• 📱 OnePlus 11/12

You can also install the application Network Analyzer and see if the phone sees 6 GHz networks.

Is it harmful for your phone to use 5GHz or 6GHz all the time?

No, it's completely safe. The only downside is increased battery consumption, since the Wi-Fi module works more intensively. If battery life is important to you, you can manually switch to 2.4 GHz when you don't need high speed.

Is there any way to force the phone to always use 5GHz?

Yes, there are several ways:

1. Disable 2.4 GHz in your router settings.
2. Create a separate network for 5 GHz (eg. MyWiFi_5G) and connect only to it.
3. On Android with root rights use applications like WiFi Band to force range selection.

On iPhone Manual switching is not possible - only through the router settings.

Why is the speed on 5 GHz lower than on 2.4 GHz?

This may happen for the following reasons:

• 📶 Weak 5 GHz signal (you are far from the router).
• 🔄 Interference on the selected channel (check in WiFi Analyzer and change the channel).
• 🛠️ It's enabled in the router 80 MHz, but the device does not support such channel width.
• 📱 Problems with the Wi-Fi driver on the phone (relevant for some models on MediaTek).

Try setting the channel manually 36, 40 or 48 (they are usually less busy).