Best mobile broadband deals: Flexible broadband from £15/month
Dan Howdle • November 14th, 2025
Mobile broadband can be a good choice if you either need a reliable broadband connection when you're out an about and don't want to lean too hard on your phone's mobile data or, as is increasingly the case, you're looking for a temporary or outright alternative to fixed-line home broadband.
And there's no need to feel left out when it comes to new customer deals and offers either, with the likes of Three and Vodafone offering similar sweeteners if you want to sign up to their mobile alternatives. Here are the best mobile broadband deals right now.
Best 4G/5G home broadband deals
These are packages with special offers on that are designed to replace – or in some cases work alongside or as a backup to – your fixed-line home broadband connection.
1. Three 5G Unlimited Home Broadband
£15 per month • Zero upfront cost
Three 5G unlimited home broadband is delivered over Three’s 5G network, with average download speeds around 150Mbps where available. It comes on a 24-month contract with no upfront cost and includes next-day delivery. It’s designed as a simple plug-in alternative to fixed-line broadband, with no phone line or Full Fibre required.
5G Unlimited Home Broadband
150Mbps average download speeds30-day money back guaranteeNext day delivery
5G
Average speed
No phone line
24
Month contract
Zero upfront cost
£15.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
2. Three 4G Unlimited Home Broadband
£15 per month • Zero upfront cost
Three 4G Unlimited Home Broadband is a good fit for homes that need mobile home broadband and can’t get reliable 5G coverage, but still want an easy wireless setup. It runs on Three’s 4G network with unlimited data, comes on a 24-month contract with no upfront cost, and can be plugged in and used straight away with no installation required.
4G Unlimited Home Broadband
150Mbps average download speeds30-day money back guaranteeNext day delivery
4G
Average speed
No phone line
24
Month contract
Zero upfront cost
£15.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
Best 4G/5G dongle and mobile Wi-Fi deals
These are packages aren't designed to replace your home broadband connection, but rather provide you an additional means to access the internet when you're away from home.
3. Vodafone 5GB Dongle or Mobile Wi-Fi Plan (24 months)
£17 per month • Zero upfront cost
Vodafone’s 5GB Dongle or Mobile Wi-Fi Plan is a lightweight mobile broadband option for very occasional, away from home, or broadband backup use. It runs on Vodafone’s 4G network and comes on a 24-month contract with no upfront cost. You can connect multiple devices through a portable dongle or mini Wi-Fi unit, with no phone line needed.
5GB Dongle or Mobile Wi-Fi Plan
Connect up to 32 devices5G ready
4G
Average speed
No phone line
24
Month contract
Zero upfront cost
£17.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
4. Vodafone 5GB Dongle or Mobile Wi-Fi Plan (1 month)
£23 per month • Zero upfront cost
Vodafone’s 5GB Dongle or Mobile Wi-Fi Plan is a short-term option with a very small 5GB data allowance, making it only suitable only for light, occasional or emergency backup use. Because it’s a one month contract, it’s going to be good in specific situations such as temporary accommodation or needing a backup connection while waiting for home broadband to be installed.
5GB Dongle or Mobile Wi-Fi Plan
Connect up to 32 devices5G ready
4G
Average speed
No phone line
1
Month contract
£49 upfront cost
£23.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
Our expert advisors have access to special offers and can create a personalised package just for you. Give us a call!
Call 0330 221 9424Mobile broadband deals – what to look out for
If you want broadband without waiting for an engineer or – in some cases – being tied into a long contract – or you’re somewhere that doesn’t have decent fixed-line options, mobile broadband can be a good alternative. Certainly preferable to satellite broadband. It uses a 4G or 5G mobile signal, just like your phone, and works through a small router, dongle or data SIM. You can set it up in minutes often be connected the next day after signing up.
That said, mobile broadband deals can vary quite a bit, so it’s worth knowing what you’re getting before you sign up. Here are the main things to look for:
- Coverage where you live – Before literally anything else, check the provider’s coverage map. Providers like Three and Vodafone – the main players in mobile broadband – have strong 4G and growing 5G networks, but speeds still depend heavily on your exact location
- 4G or 5G speeds – 5G can be very quick and often outperforms entry-level fibre, while 4G is usually fine for general browsing and streaming. If you rely on your connection for work or streaming in HD, 5G is well worth considering
- Data allowance – Some deals are truly unlimited, others come with caps. If you watch a lot of telly online or have several people using the connection, an unlimited package will save you worrying about running out
- Contract length – You’ll see everything from one month rolling deals to longer 12 or 24-month options. Shorter ones do cost a bit more, but they’re easier to leave if your needs change. You're paying for the convenience
- Type of device – Dongles are best if you only need to get one device online. Home 4G/5G routers can support lots of devices at once, making them a better fit for households
- Next day broadband – One of the biggest perks is that everything works straight out of the box. No engineer visits, no drilling and no waiting around, and you can be online the day after ordering
- Extras and rewards – Some deals include bill credits or reward cards, so it’s worth checking what each provider is offering at the time
If you want something you can plug in today, or you’re not able to get a decent fixed-line connection, mobile broadband can be a surprisingly solid option – especially now that 5G is available in more and more areas.
Mobile broadband deals – who are they for?
Mobile broadband isn’t for everyone, but it can be a really useful option in the right circumstances. Because it runs over 4G or 5G rather than a fixed line, you don’t need to wait for installation, making it a good choice for certain situations.
Broadly, these are the kinds of people who tend to get the most out of it:
- Renters and frequent movers – If you move often, you might not want the hassle of setting up and cancelling traditional broadband each time. With mobile broadband, you can simply take the router or dongle with you
- People waiting for installation – It’s a handy stopgap while you wait for your fixed-line broadband to be installed or repaired
- Homes without good fixed-line options – In some areas, 4G or 5G can be quicker and more reliable than older copper broadband
- Students – If you’re only living somewhere for a term or two, a short-contract mobile broadband package might suit you better than a full 12 to 24-month broadband contract
- Holiday homes and outbuildings – Great for places where you just need a connection now and again, that's outside your home's Wi-Fi range, or where running a fixed line would be just be plain awkward
- People who need broadband immediately – If you don’t want an engineer visit, drilling, or waiting for an installation date, mobile broadband is about as easy as it gets. Plug in the router (it'll be posted to you immediately) or insert the dongle and you’re away
- Backup broadband – Some people keep a PAYG or one month mobile broadband package as a backup in case their main connection goes down
If you recognise yourself in one of these groups, mobile broadband could be the right fit.
Our broadband checker will find you the best deals, providers and speeds where you live. It's free and takes less than a minute to check and compare.
