As we all know, there is nothing worse than having no Wi-Fi. Except perhaps having really slow Wi-Fi.
1. Signal congestion is the enemy of a strong Wi-Fi signal.
And it's not just routers: Mobile phones, cordless phones, microwaves, Bluetooth devices, and even cordless baby monitors can worsen signal strength.
Given that you might be trying to access a wireless signal through one or more internal walls as your router competes with anything up to 50 connected devices in the area, it's a wonder that some Wi-Fi connections work at all.
2. Wi-Fi devices can't receive and send data at the same time.
This is made worse by so many people using the same channel.
Plus, if you live in a very congested area, your router may be hopping around different channels trying to find the best one, and that can affect your signal.
ISPs get complaints about bad coverage and loss of signal but there's not a great deal they can do about this.
3. Wi-Fi is often just not as good as a wired ethernet connection, and there's not a lot we can do about it. For very fast speeds you may have to plug in.
4. Still slow? Are you trying to sync 2,000 HD photos to Dropbox right now? That might have something to do with it.
6. Don't forget also that some devices are better than others at connecting to Wi-Fi.
Don't be surprised that your old iPhone 3G isn't quite as whizz-bang fast on your home network as your friend's iPhone 6 – processing speed and capability is a factor too.
So how can you get faster Wi-Fi speeds?
– Upgrade your router to one that uses the newer 5GHz frequency and not the older, more congested, 2.4GHz one (although it's worth noting that 5GHz doesn't travel around buildings and through walls nearly as well...and many mobile devices won't work on 5GHz).
– Look for a less congested channel to use. Here is a guide on how to do it and here is a video tutorial – it's a bit fiddly, but the free inSSIDer app will tell you what channels all the local networks around you are using (or try iStumbler for Macs).
– Try buying a second router and hooking it to your main router with a cable to spread the signal through your house. Or try powerlining.
– Oddly, if there are variable power settings on your router, it will work better on a lower setting than a higher one. More advice like this is in Biddle's article.