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How to extend Wi-Fi range: Increase your speed and fix slow internet problems

Christopher Minasians
6 Apr 2018
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Find and fix Wi-Fi problems, extend range and increase internet speed with our complete guide for your wireless network

Wireless networks are one of the finest achievements of the 21st century, but they can be quite a hindrance from time to time. We're now far too familiar with the phrase "has the internet gone down?" – while we can now get pretty much any device online, the connection isn't always that reliable. If you're struggling to connect, you've come to the right place.

We're here to help give you the best tips out there for making the most out of your Wi-Fi, from extending your range to increase your speed. You'd be surprised to see how easy it is to make your wireless experience much better. There are a bunch of different ways you can go about improving wireless networks, from free options, such as simply tweaking a couple of settings, to the expensive ways of buying a fancy kit. You'll need to think which method is best for you and work out what kind of budget you'd like to spend (if at all).

In this guide, we'll show you the ins and outs of what's causing the problems in the first place, so you can take the necessary steps to stop them happening in the future. To that end, we'll show you how to detect interference and configure your way out of it, how to properly configure a wireless router (both 802.11n and 802.11ac standards and 2.4GHz and 5GHz radio bands), and how to extend your network the proper way. By the time you're done, you'll have a rock-solid and reliable wireless network, with coverage wherever you need it.

For ease of reading, we've split this article into multiple pages, so you can use the navigation at the top and bottom of this page to jump to the section that most interests, or is most relevant, to you. This page covers the issues with Wi-Fi and why it can slow down. It's essential background reading, as understanding why Wi-Fi has problems can help you fix and eliminate them.

The trouble with Wi-Fi

Most Wi-Fi problems are caused by interference. This is because the majority of networks operate on the 2.4GHz frequency band, which is also used by a host of other devices, including baby monitors, DECT phones, Bluetooth headsets and game controllers. That's not even counting all of the other wireless networks out there competing with your own. 

Indoors, the construction of your home has an impact: wood, plaster and glass have little impact on 2.4GHz radio waves, but brick and concrete can impede them; in some cases, if your router's mounted on a brick wall or sat on a metal shelf, simply moving it can make a difference.

Newer routers can also work on the 5GHz band. This has the advantage that there are far fewer things to interfere with the wireless signal, with the frequency reserved for networking; the downside is that range of these networks is a lot less than with 2.4GHz networks.

Whether you've got a 2.4GHz or 5GHz network, the key to a trouble-free life is to minimise interference where possible and use an additional kit to extend range where physical factors (range and the construction of your home) are the limiting factors.

READ NEXT: Best wireless routers 2018: Boost the range and speed of your internet connection

Diagnosing Wi-Fi problems

While it's easy to blame everything on wireless, not all network problems are caused by the technology itself. Poor range, for example, is often just a limitation of your router and is easy to diagnose, as your devices will stop connecting the further you get from the router. While tweaking some wireless settings can help this issue a little, the best way to fix range problems is with a brand-new router, or by installing a second wireless access point in the area where you get poor reception. We'll show you how to tackle both of these solutions later.

Speed is trickier to diagnose, as a slow internet connection may be caused by something else. For example, if your router's a long way from the master phone socket where your broadband comes in (ADSL and BT Fibre only), poor-quality wiring in your home could mean that your internet connection is slow, making it appear as though there's a Wi-Fi problem.

Before you do anything else, it's worth using SpeedTest to test your internet connection speed. Run the test using a computer connected via wireless and then again via a wired computer connected via Ethernet. A discrepancy in the speeds via the two tests may indicate that there's a wireless problem, but be careful: an old router may not provide enough Wi-Fi speed for your internet connection (read about standards below).

SpeedTest online broadband speed checker

If your internet connection is slow via both connection types, try moving your router and plugging it into the master telephone socket (ADSL and Fibre only, Virgin Media cable connections won't be affected by this). If you see an improvement in speed, it's internal cabling, so you should leave the router in its new position, or replace the old cabling.

A second test can be timing how long it takes to copy a file to a shared folder or NAS over your wireless network. If it's exceptionally slow, you'll know it's a wireless problem. If speeds don't seem too bad, don't give up reading yet, as making some tweaks to your router's settings may increase speeds anyway.

READ NEXT: Best antivirus software 2018: Keep your PC safe without slowdowns and interruptions

New Wi-Fi router buying guide

Now that you've got an idea of what the problem is, it is time to fix it. One of your first thoughts may be to buy a new wireless router. Depending on the age of your router, you could be onto a good thing: modern routers are faster, more tolerant of interference and easier to configure.

Before you rush out and buy a new router, it's worth following the advice below to see if you can eke out a bit more speed for free. If you can't or you want a much faster network, you need to understand the current Wi-Fi standards and what they mean, before you buy.

A standard defines the maximum theoretical speed of a network, although you're likely to get a lot less in practice. Newer standards offer faster throughputs and, generally, better range. They're backwards compatible with older standards, so you can still use your existing wireless devices. Better range becomes evident on all devices, but you'll only see the faster speeds if your devices also support the faster standard.

Old wireless routers will use the 802.11g standard, which has a theoretical throughput of 54Mbits/sec. Some routers can use a technique called channel bonding to increase speeds to 108Mbits/sec or 125Mbits/sec, but this also increases interference, as the router uses two wireless channels and can actually slow your network down. Nowadays 802.11g networks are very old and, with actual throughputs of around 25Mbits/sec, quite slow. We wouldn't recommend buying an 802.11g router, but if you've got one in your home, it's definitely worth upgrading from.

Still current are 802.11n wireless networks, which have a maximum throughput of 300Mbits/sec when using channel bonding, and 150Mbits/sec using a single channel. These networks can run on the 2.4GHz band and the 5GHz band. All routers offer the 2.4GHz band, some offer the 5GHz band as an alternative while fewer still let you run dual 2.4GHz and 5GHz networks. All laptops made in the last couple of years and the vast majority of smartphones support this standard. With throughputs of around 50Mbits/sec, these routers are still quite fast. If you've got an older 802.11g router or a slow 802.11n router, upgrading could help improve your network speeds.

The newest standard is 802.11ac. These routers use a superfast 5GHz network (it's backwards-compatible with 5GHz 802.11n), with speeds of 867Mbits/sec and 1.3Gbits/sec available. We typically see speeds of at least 150Mbits/sec, although we've seen close-range speeds hit closer to 300Mbits/sec. While you can only get the best speeds using the 5GHz network, 802.11ac routers also have a 2.4GHz, 802.11n network for backwards-compatibility. In the case of these routers, the range of the 802.11n network is generally better than for a "pure" 802.11n router.

You have to have an 802.11ac wireless device to get the full throughput, with some laptops, including the MacBook Air, and some smartphones, including the Samsung Galaxy S7, have the technology built in. You can also buy USB 802.11ac wireless adapters if you want to upgrade a PC or laptop to use the new standard. These routers are the fastest and most reliable and are worth buying if you want the best performance and range, plus future compatibility with new devices.

The only other choices you have when buying a new router are the type and the number of wired ports. For type, you can buy either ADSL routers that plug into your phone line or a cable router, which plugs into a modem for a fibre connection via Ethernet. Note that Virgin Media supplies a wireless router that contains the modem inside it; if you want to replace this you need to buy a cable router and put the Super Hub into modem mode. 

Given that ADSL speeds aren't generally fast enough to warrant 802.11ac, you'll find it hard to get an ADSL router that supports this standard, and may have to go for 802.11n.