WiFi Bands and Routers: 2.4 GHz, 5 GHz and Placement

Key takeaways

• Most home routers offer 2.4 GHz and 5 GHz, and newer ones may add 6 GHz; no band is better in every situation.
• Use 5 GHz close to the router and 2.4 GHz when you are far away or behind several walls.
• WiFi generations are numbered, and the Wi-Fi Alliance lists Wi-Fi 4 as introduced in 2009, Wi-Fi 5 in 2014 and Wi-Fi 6 in 2018.
• Router placement is often the cheapest fix: central, open and raised, away from thick walls, metal and interference sources.
• Change the default WiFi and administration passwords as soon as the connection is set up.

Why does your router matter as much as your plan?

Many people look at the plan first and the router last, but the router decides how well the connection reaches your phone, laptop and television. A router is the device that takes the broadband line and shares it wirelessly through WiFi. If it is old, badly placed or set up poorly, even a strong line can feel slow in parts of the house. This guide explains the common WiFi bands, router standards and a few simple habits that often improve coverage without spending anything.

What is a WiFi band?

WiFi uses radio waves, and these waves are sent on set ranges of frequency called bands. Most home routers offer two: 2.4 GHz and 5 GHz. Newer routers may also support a 6 GHz band. Each band has its own character, and no band is better in every situation.

• 2.4 GHz: reaches farther and passes through walls more easily, but it is usually slower and more crowded because many household devices and neighbouring networks use it.
• 5 GHz: usually allows faster transfer and less congestion, but its signal weakens more quickly with distance and through walls.
• 6 GHz: offered on newer equipment, with more free space and short range, and it needs devices that support it.

WiFi bands compared

How do you choose which band to use?

A simple rule is to use 5 GHz when you are in the same room or one room away from the router, and 2.4 GHz when you are far away or behind several walls. Smart home devices such as plugs and some cameras often work only on 2.4 GHz. Many routers combine both bands under one network name and choose automatically, while others let you name them separately. If a device is having trouble connecting, trying the other band is a quick test.

What do router standards mean?

Routers and devices follow numbered standards, often written as WiFi 4, WiFi 5, WiFi 6 and so on, with an older naming such as 802.11n or 802.11ac. In general, a higher number is a newer generation that handles more devices and offers more capacity. Both the router and the device need to support a standard to use it. An old phone connected to a new router will still work but at the older device's limit, so upgrading the router alone does not speed up every gadget.

A router described with a very large combined speed number is usually adding up the capacity of several bands under ideal laboratory conditions. Real use will be lower. Treat such numbers as a rough marker of the generation, not as a promise.

Where should you put the router?

Placement is often the cheapest and most effective fix. WiFi spreads outward in all directions, so a router tucked in a corner sends half its signal outside the house.

• Place it near the centre of the area where you use devices most.
• Keep it in the open and raised, on a shelf or table, not on the floor or inside a closed cabinet.
• Keep it away from thick walls, large metal objects, mirrors and aquariums, which can block or absorb signals.
• Keep it a little away from microwave ovens, cordless phones and baby monitors that can cause interference on 2.4 GHz.
• Point external antennas, if any, in different directions, for example one upright and one at an angle.

How do you reduce interference?

In apartment buildings many routers operate close together, and they can interfere with one another by using the same channel. Many routers pick a channel automatically. If your WiFi becomes poor in the evening, when neighbours are online, the router settings may let you choose a different channel. Restarting the router occasionally can also help it select better settings. If you are not comfortable changing settings, ask the provider's support team to guide you.

How do you extend coverage in a larger home?

If one router cannot cover the whole house, there are a few options. Each has strengths and limits, so match the choice to your home.

• Repeaters or extenders: pick up the signal and repeat it. They are simple to set up but can reduce speed on the repeated link.
• Mesh systems: several units that work together under one network name, often giving smoother coverage across floors.
• Wired access points: connected to the router by a network cable, which usually gives the most reliable result where cabling is possible.
• Powerline adapters: use the home's electrical wiring to carry the signal, and their results depend on the quality of the wiring.

Where you can, connect fixed devices such as a television or desktop computer with a network cable. A cable removes WiFi from the equation for that device and frees up wireless capacity for phones and laptops.

What are the security basics?

Change the default WiFi password and the router's administration password as soon as the connection is set up. Use a long password that is not easy to guess, and keep the router's firmware updated if the provider allows it. Do not share the administration page address or credentials casually. A guest network, if available, lets visitors get online without access to your main devices.

Should you use the provider router or your own?

Providers often supply a router as part of the service, sometimes for a charge or a refundable deposit. Some allow you to use your own router, and some do not, or may limit support if you do. Ask these questions before installation.

• Is a router included, rented or sold, and how is it charged?
• Can I use my own router, and will support still be given?
• Does the supplied router support both 2.4 GHz and 5 GHz?
• What happens to the router if I end the service?

Equipment, charges and policies differ by provider and city. Check with the provider and official sources before you decide.

Sources and further reading

• Wi-Fi Alliance: Wi-Fi 6: lists the Wi-Fi generations by number, with Wi-Fi 4 introduced in 2009, Wi-Fi 5 in 2014 and Wi-Fi 6 in 2018, and notes the 2.4 GHz and 5 GHz bands used by earlier generations.
• Wi-Fi Alliance: Security: describes WPA3 and notes that WPA3-Personal gives stronger defences against password guessing.

Frequently asked questions