Mobile broadband vs fixed line broadband: Which is best for me?

ByKim Staples
Dongle and laptop

There are two ways you can connect to the internet: through a fixed line connected to your home, or through mobile broadband that you can carry around anywhere with you. But what exactly are they? And which one is best?

Well, mobile broadband works by connecting to a mobile network with a SIM card. It's the internet you connect to when you're out and about with your smartphone, either 3G or the faster and more reliable 4G.

You can connect to mobile broadband by using a dongle, in-car Wi-Fi device or portable Wi-Fi hotspot, a SIM card in a tablet or laptop, or by tethering from your mobile phone.

Fixed line broadband, on the other hand, is what we usually mean when we use the word 'broadband' - an internet connection in your home, delivered via your phone line or through the provider's network of cables. You'll get it as either standard ADSL or superfast fibre optic. It connects to a router, which you can then connect to all your devices through Wi-Fi or an Ethernet cable.

Advantages of mobile broadband

  • It's portable. You can take your dongle, Wi-Fi hotspot, mi-fi, or phone anywhere - whether you're travelling, moving home, streaming music in your car, or popping to a local café to do some work. On the other hand, fixed broadband is, well, fixed, and can only be used at home.
  • It's a great way of getting broadband (or higher download speeds, or a more reliable connection) in areas where a fixed line is a bit iffy or difficult to reach - especially in rural areas.
  • There's no need for line rental. All you need is a SIM and a compatible device.
  • Mobile broadband plans are usually a lot more flexible. Some networks provide monthly rolling contracts or pay-as-you-go deals - whereas fixed line broadband is almost always on at least a 12-month contract, and you'll be hard pressed to find it on a pay-as-you-go basis.
  • In some areas, 4G speeds can be higher than those of the local fixed broadband. The average download speed on 4G in the UK is 15.1Mb, a lot faster than the measly 2Mb maximum you'll find on fixed broadband in some parts of the country.

Mobile broadband is probably the best option if you're a very light user and don't want or have a phone line at home, or if you travel a lot and moving your internet connection around with you is important.

And, of course, it's a solution you'll often see in those really rural areas that fixed broadband lines struggle to reach.

For more info on what you can get, you can read all about mobile Wi-Fi devices, or find out more about dongles.

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Advantages of fixed line broadband

  • It's more widely available. If you can get a landline, you can almost certainly get fixed line broadband. 4G coverage, however, is a lot more patchy, with most networks covering somewhere between 60% and 90% of the population. 3G usually has better coverage, but with far slower speeds. Use our postcode checker to see what fixed line broadband is available in your area.
  • It's more reliable. Fixed broadband has much lower latency (that's less lag, if you're a gamer), making it better for things like games and video calls.
  • In most areas, it's faster than 4G. This particularly applies to busy urban areas, towns, and cities, and anywhere where fibre optic connections are available. The average broadband speed nationwide is 22.8Mb, quite a bit faster than the average 4G, and some providers can get you superfast speeds - up to 200Mb with Virgin Media's ( top-tier package, for instance.
  • Download limits are usually far higher than mobile broadband of the same price. Most providers even offer packages with unlimited downloads. Mobile broadband plans, however, almost always have restrictive usage caps with high costs when you exceed them.
  • If you already have line rental at home, it'll most likely work out cheaper to throw in broadband too, rather than getting a mobile hotspot. You may even be able to add TV as well, with a provider like BT ( or TalkTalk (

Generally speaking, fixed broadband is the best option for most of us. You can usually get a better deal, it's far more reliable, and you're less likely to be strangled by slow speeds and data usage caps. And it's an absolute must if you want to play games, stream HD video, or download files in a reasonable amount of time, or if multiple people need to use it at once. Although you can connect lots of gadgets up to a mobile broadband device - up to 32 in some cases - fixed line broadband usually has more bandwidth to cope with it.

Mobile broadband is much more suited to situations where you need temporary internet, or if you'll be doing a lot of travelling over the coming weeks or months, and need to take your internet out and about with you.

Fixed line broadband deals

Origin Broadband
Post Office
Broadband Unlimited Fast Broadband Unlimited Broadband - Line Rental Only Unlimited Broadband Unlimited Infinity 1 + Weekend Calls Unlimited Broadband + Weekend Calls
£189.95 Total first year cost £239.40 Total first year cost £362.00 Total first year cost £233.88 Total first year cost £418.87 Total first year cost £228.00 Total first year cost
£15.00 p/m for 12 months £9.95 setup costs 12 month contract £19.95 p/m for 12 months 12 month contract £26.00 p/m for 1 month £50.00 setup costs 1 month contract £19.49 p/m for 12 months 12 month contract £31.99 p/m for 12 months £34.99 setup costs 12 month contract £19.00 p/m for 18 months 18 month contract
Up To 17 Mb Up To 17 Mb Up To 17 Mb Up To 17 Mb Up To 52 Mb Up To 17 Mb
Pay as you go Pay as you go Pay as you go Pay as you go Weekend calls inc. Weekend calls inc.
Totally Unlimited Broadband! Offer ends 28/09/17 Free Set Up! Offer ends 28/09/17 Unlimited downloads Free Set Up! £120 BT Reward Card - see BT's website for further details Offer ends 28/09/17 Unlimited Broadband Offer ends 31/01/18
Call Sky on 0800 759 1469
Mon to Sun 8am-10pm
Call TalkTalk on 0800 049 7843
Mon to Thurs 8am-10pmFri to Sun 8am-9pm
Call SSE on 0345 078 3294
Mon - Fri 8am-8pmSat 8am-2pm
Go Go
Call BT on 0800 783 5390
Mon to Sun 8am-6.30pm

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