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Tethering explained - all you need to know

23rd October 2018

Tethering explained

With Wi-Fi hotspots growing more ubiquitous by the day, the need for tethering has diminished somewhat in recent times. But it remains a valuable resource for those looking to work on the go.

So what exactly is tethering? How do you go about tethering? And what kind of tethering service do the UK networks provide?

What is tethering?

Tethering is the term used for broadcasting your phone’s mobile signal as a Wi-Fi network, then hooking a laptop or any other Wi-Fi-enabled device up to it to connect to the internet.

How does tethering work?

When tethering, a phone essentially becomes a portable Wi-Fi hotspot. You’ve probably seen that term, or something similar, used as a more descriptive replacement for tethering. Personal Hotspot is often the term you’ll find in the settings screen of your smartphone.

If you’ve ever been in a public location, such as a train, and discovered someone’s phone listed as an available Wi-Fi hotspot, it means that phone is set up for tethering.

Tethering works by forming a local connection between a laptop (to use the most common example) and a mobile phone. That connection can be a physical one in the form of a USB cable, or wireless through Bluetooth or Wi-Fi. These days, wireless is the more common method.

What are the advantages of tethering?

While Wi-Fi hotspots are now incredibly common across the developed world, we’re still far from the point of universal wireless internet coverage. Wherever there is no Wi-Fi connection - be it a holiday property, public transport, or a remote location where no physical lines exist - tethering can often be the most convenient way to connect a laptop or tablet to the internet.

At other times, tethering can offer a faster and more reliable internet connection than standard Wi-Fi. This is often the case in urban areas where 4G performance is strong while the nearest public Wi-Fi hotspot is oversubscribed or just plain slow.

There’s also the matter of security, with many public Wi-Fi hotspots being inherently insecure. A correctly set up tethered connection (tip: always choose the ‘WPA2’ option), on the other hand, essentially grants you your own password-protected network.

What are the disadvantages of tethering?

Generally speaking, a tethered internet connection will be slower than a regular internet connection. Even the very best and most up to date 4G services can’t compete with a good Wi-Fi hotspot in terms of pure performance - though that could well change with the arrival of 5G from 2020.

There’s also the cost of tethering to consider. Just because you have a generous data allowance on your mobile contract, it doesn’t necessarily mean that tethering will be covered by it (see below). Even if it is, you can quickly burn through that allowance when tethering, as browsing the internet on your laptop tends to consume a lot more data than browsing directly on your phone. This is because you’ll likely be loading up full desktop web pages rather than their data-sipping mobile equivalents.

Finally, wireless tethering tends to take a lot out of your smartphone’s battery. Maintaining a constant and intensive connection to the internet, and also to your tethered device, consumes a lot more power than regular smartphone tasks.

How to activate tethering

The good news is that the tethering feature is readily built in to and supported by most handsets. 

On Android just go to the settings screen and tap ‘Wireless & Networks’. The tethering option may now be visible, if not, look for a ‘More’ option and see if that brings it up.

However, tethering may be labelled as something else, such as ‘mobile network sharing’ or ‘portable hotspot.’

Whatever it’s called on your handset of choice find it and tap it, then you’ll be able to choose between Wi-Fi, Bluetooth or USB tethering. For USB tethering you will of course need to have connected your handset to whatever device you want to share its connection with via USB cable, at which point it should be a one-tap setup.

For Bluetooth tethering you’ll have to pair the two devices by following the onscreen instructions, and for Wi-Fi tethering you’ll have to enter a network name and password, then enable Wi-Fi on the device which you want to share with, select the network you’ve just set up and enter the password.

The process on an iPhone is very similar, the only real difference is where you’ll find the tethering option. In this case you once again head to the settings screen, but then select ‘General’, then ‘Network’ and finally ‘Portable Hotspot.’

What tethering services do the UK networks provide?

Whether you can tether or not, and to what extent, depends on the network you’re on and the specific contract you’re signed up to.

For a full guide to the tethering terms and limitations on every UK network check out the link above.

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