Unlimited data plans

Can I get a SIM with unlimited data?

Three offer SIM only deals with unlimited data on 1 month, 12-month and 24-month plans. However, data only SIM deals for use in tablets and mobile broadband devices are only available with a maximum of 100GB of data.

Are Three's unlimited data plans 5G Ready?

Three's SIM Only plans including those with unlimited data are 5G Ready at no extra cost.

When Three's 5G network rolls out all existing and new customers will be able to access 5G, although they will need to have a 5G phone and be in a 5G coverage area.

Can I get unlimited data on a Pay As You Go plan?

Yes, unlimited data is available with two Pay As You Go bundles, one of which costs £35 and lasts 30 days, the other costs £90 and lasts 90 days.

Both also include unlimited minutes and texts for the duration and the 30-day one includes a free 1 month subscription to the likes of Xbox Game Pass, Rakuten or Headspace. Plus, you’ll also receive reward points which help you work towards additional subscriptions and discounts.

How much does the cheapest contract cost?

The cheapest Three unlimited data plans are available on SIM Only and start at just £10 per month (for the first 6 months, then rising to £20 per month) on a 24 month plan, £20 per month on a 12 month plan, or £26 a month on a flexible one month rolling contract. Plans with a mobile phone included start from £25 a month, but to get a flagship smartphone you'll be looking at paying significantly more.

Which networks offer unlimited data?

As well as Three's a number of other networks offer unlimited data plans, but Three offer great value with 5G at no extra cost, no speed restrictions and come with worldwide roaming.

The other options include Vodafone, who offer unlimited data, but have speed limits on all but the most expensive plan. EE also offer unlimited data, and even give you swappable benefits with your contract, but prices are high. O2 also offer unlimited data, but prices are significantly higher than Three and they arn't 5G ready.

GiffGaff also offer unlimited data add-ons, but speeds are capped after using 40GB of data to just 384Kbits/sec, between 8am and midnight, which is slower than 3G download speeds. Virgin Mobile meanwhile offers an unlimited data SIM plan but only for existing Virgin Broadband and TV customers.

Then there’s Smarty, which has an unlimited data option but only for SIM Only, while Lycamobile offers unlimited data but caps you at speeds of 128kbps after 9GB and doesn’t allow tethering.

Can I use a personal hotspot to share internet with my other devices?

Unlimited tethering over a personal hotspot is included on unlimited data plans. You can use any or all of your data allowance to tether in the UK, which with unlimited data means there’s no limit. You can also tether in Go Roam in Europe destinations, though there’s a 19GB cap there. Tethering isn’t allowed in Go Roam Around the World locations unless you purchase a Data Passport (at a cost of £5 per day).

Can I use unlimited data when roaming abroad?

Three allows you to use your data abroad in 71 international destinations at no extra cost. However there are some minor restrictions, including the use of data, which is capped at 19GB when in a Go Roam in Europe destination or 12GB when in a Go Roam Around The World destination. But in most cases that should still be more than enough for even the longest of holidays. Note that if you’re on Pay As You Go then the cap in Europe is 15.1GB.

Those who need unlimited data when abroad have the option of purchasing a Data Passport add-on which costs £5 a day. That gives you unlimited data in 89 countries across the world. Find out more here.

Can I use Go Binge with an unlimited data plan?

Go Binge comes with all unlimited data plans, so you can tether Netflix, Apple Music, Snapchat, Soundcloud, Deezer and TV Player without using any of your tethering allowance. You can also use Go Binge in Go Roam destinations, although it will count towards your fair use roaming allowance, and tethering isn’t allowed when roaming beyond Europe, so you won’t be able to use Go Binge on other devices when travelling further afield.

Three has less control over speeds and availability of services when abroad though so can't guarantee the same level of performance as you would get in the UK.

Where can I use my data?

You can make use of your unlimited data plan anywhere in the UK, just as long as there’s coverage, which in most cases there will be, as 99.8% of the UK population receives Three 4G coverage and 98.7% can get a Three 3G signal at the time of writing. You can also use it outside the UK free in Go Roam destinations, subject to the cap detailed above. Go Roam is expanding its reach all the time, but if you want to use data somewhere where it isn’t currently offered, roaming charges will apply.

Can you get unlimited mobile broadband plans?

Yes, Three offer mobile broadband plans with unlimited data. Currently, you can get unlimited data with a Huawei Mobile WiFi E5573bs-322 router, HomeFi Home Broadband router, Huawei B535 WebBox or the Huawei AI Cube Home Broadband Router.

What is TrafficSense?

TrafficSense is Three's management of data traffic and is a way of ensuring the best possible mobile internet experience is given to users.

In general you won’t notice this at work, the aim is to give you a smooth experience and if that’s happening then TrafficSense is doing its job. However, in order to achieve that some types of data use will see small restrictions at certain times. For example, in Go Roam Around the World locations Three only offers streaming at standard definition, as well as reducing the speed of P2P and VPN services.

TrafficSense may also be noticeable in times of heavy congestion or network faults, at which point restrictions and prioritisations may be used to ensure the network continues to run smoothly.

Are there any restrictions?

The only restriction apart from the roaming ones outlined above is that unlimited data plans aren't permitted for commercial use. If data usage reaches 1000GB in a month Three may investigate whether commercial use is taking place. However for non-commercial use it’s very unlikely that you’ll ever get anywhere close to the cap, even if you use your phone as your main or only internet device.

The information contained on this website has been written to assist our readers. We do not represent Three or speak on its behalf and are entirely independent of Three.