SMARTY offers a £16 unlimited data SIM card with no contract and no credit check required.

In the UK, SMARTY Mobile is currently offering an unlimited data SIM card for £16/month.

As a special offer that’s running in October 2021, you can get an exclusive £4/month discount when you order through this link. This gives you unlimited minutes, unlimited texts and unlimited data for £16 per month.

The plan is available on a one-month rolling basis, with no contract and no credit check required. You’ll get 3G and 4G coverage from the Three network.

Order SMARTY Unlimited SIM (with £4/month discount) →

In this article, we’ll review SMARTY’s unlimited data SIM card. We’ll start by looking at what their £16 unlimited data plan includes, the download speeds available and the monthly fair usage policy. We’ll then look at how SMARTY’s unlimited data SIM card compares to rival networks and at the coverage available on SMARTY. Finally, we’ll look at how you can keep your current phone number when moving to the SMARTY network.

Monthly Price: £16 per month
Contract Length: No contract & no credit check
Special Offer: Save £4 per month on SMARTY’s unlimited data plan (ends 1st November 2021).
Fair Usage: Personal use only. No fair usage limit inside the UK.
Compatible With: Smartphones, tablets & 4G broadband devices
Coverage: 99% population coverage on 3G & 4G (powered by Three)

Unlimited Data on SMARTY

No Download Limits

In the UK, SMARTY is a low-cost mobile network which is owned and operated by Three. Specialising in SIM cards that work on a one-month rolling basis, customers can join SMARTY without the need for a contract or credit check.

At the moment, SMARTY’s flagship price plan is their £16 unlimited data plan. This comes with unlimited minutes, unlimited texts and unlimited data. For a limited time only in July 2021, you can get an exclusive £4/month discount on the normal price of £20/month. To get it, you’ll need to order your unlimited data SIM card from SMARTY through this special link:

NetworkMinutesTextsDataMonthly
Cost
SmartyUnlimitedUnlimitedUnlimited£16.00
1 month

Get £4/month discount on Unlimited Data →

SMARTY’s unlimited data plan works on a pre-paid basis so you’ll just pay for each month’s usage in advance. For convenience, the payment for your plan will normally be taken automatically every month from a registered credit card or debit card. However, you can disable the automatic renewal at any time inside your SMARTY account if you’d no longer like to use it.

For any out-of-bundle usage (e.g. international or premium-rate phone calls), you can top-up a separate cash balance onto your SMARTY account.

4G Download Speeds

On SMARTY’s unlimited data plan, you’ll get access to 3G & 4G coverage from Three. The download speeds available on SMARTY are the same as those available on Three’s 4G network, with no speed restrictions or throttling in place on the service.

In theory, it’s possible to get download speeds of up to 300Mbps on SMARTY’s 4G network. However, download speeds can vary substantially by location and will more typically be in the region of about 20Mbps.

As a customer of SMARTY, you’ll benefit from Three’s ongoing 4G network upgrades. This includes the introduction of 4G+ technology, the upgrade of older 3G spectrum to support 4G, and the introduction of L-Band spectrum (giving Super 4G+ coverage). These 4G network upgrades have recently improved speeds by up to 130% for customers on SMARTY.

Unfortunately, 5G coverage is not yet available on SMARTY. If you’re looking for an unlimited data plan that gives you 5G coverage, we’d recommend getting a SIM card from Three instead. On Three, you’ll get unlimited data from £16 per month with access to 5G speeds in 194 towns and cities that have 5G coverage.

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimitedUnlimited£16.00
12 months

For more information, see our Three unlimited data review.

Fair Use Policy

SMARTY doesn’t have any speed restrictions or hidden fair usage limits for unlimited data in the UK. This is confirmed in their price guide:

With our Unlimited plan there’s no hidden ‘fair use policies’ within the UK, giving you all the access to the Internet you’d need without worrying about hefty bills and no data speed restrictions.

If you’re travelling in the EU you will be subject to our fair use limit of 12GB each month.

All our SMARTY plans must only be used for your personal and non-commercial use.

In the past, a fair usage limit of 1,000GB per month was used to identify non-permitted commercial usage of the service. SMARTY has confirmed that this fair usage policy is no longer being applied.

If you’re using your SMARTY SIM card in another European country, a fair usage limit of 12GB per month applies on the plan. This fair usage limit was reduced from 20GB per month on the 1st June 2021.

Tethering & Personal Hotspot

You can share your unlimited data allowance with other devices through the tethering or personal hotspot function on your phone. This is confirmed on the SMARTY website:

Tether without worrying
You can tether and hot-spot all of your data with no speed caps as long as you’re in the UK.

The use of tethering or personal hotspot can be a convenient way to get your other devices (including a laptop or tablet) connected to the internet.

SMARTY Mobile Broadband

You can use SMARTY’s unlimited data SIM card in other devices like your tablet, mobile broadband dongle, mobile wi-fi hotspot or 4G home broadband router.

In fact, you can build your own 4G home broadband service by combining SMARTY’s unlimited data SIM card with something like an unlocked Huawei B311 router. You’d then pay just £16/month for unlimited 4G home broadband through your SMARTY SIM card.

One downside of using SMARTY for 4G home broadband is the lack of a publicly-accessible IP address. This is because SMARTY uses strict CGNAT technology, assigning you an IP address that’s unable to accept incoming connections. This won’t make a difference for most online activities, but it can stop you from doing things like running a server, using certain P2P apps or playing some online multiplayer games.

If you’d like a publicly-accessible IP address, it’s better to get a SIM card from Three instead. On Three, you can get a public IP address when using the 3internet APN. This service is not available to customers on SMARTY.

Comparison to Alternatives

In the UK, there are numerous other mobile networks also offering an unlimited data plan.

At the current price of £16/month with no contract, SMARTY’s unlimited data plan is one of the cheapest and most flexible unlimited data plans on the market.

If you want 5G at no extra cost along with Go Roam Around The World (inclusive roaming in 71 destinations), you could also consider getting unlimited data on Three. On Three, unlimited data is currently available for £16 per month.

The following table compares SMARTY’s unlimited data plan to what is available on other networks:

NetworkMinutesTextsDataMonthly
Cost
SmartyUnlimitedUnlimitedUnlimited£16.00
1 month
ThreeUnlimitedUnlimitedUnlimited£16.00
12 months
Superdrug MobileUnlimitedUnlimitedUnlimited£20.00
1 month
VodafoneUnlimitedUnlimitedUnlimited
2Mbps max
£22.00
24 months
giffgaffUnlimitedUnlimitedAlways-On£25.00
1 month
Lebara MobileUnlimitedUnlimitedUnlimited£25.00
1 month
O2UnlimitedUnlimitedUnlimited£26.00
24 months
VodafoneUnlimitedUnlimitedUnlimited
10Mbps max
£26.00
24 months
VodafoneUnlimitedUnlimitedUnlimited£30.00
24 months
VOXIUnlimitedUnlimitedUnlimited£35.00
1 month
EEUnlimitedUnlimitedUnlimited£40.00
24 months

For more information, see our full guide to unlimited data plans in the UK.

Network & Coverage

3G & 4G Coverage from Three

On SMARTY’s unlimited data plan, you’ll get 3G & 4G coverage from the Three network. At the time of writing, this equates to 99.8% population coverage on 4G and 98.7% population coverage on 3G.

You can check the coverage in your area by entering your postcode on SMARTY’s online coverage map:

Check SMARTY Coverage Map (smarty.co.uk) →

On SMARTY, you’ll also have access to 4G Calling and Wi-Fi Calling if you have a compatible device.

Unfortunately, SMARTY doesn’t provide any 2G coverage. For this reason, your mobile phone will need to support at least 3G coverage at a minimum. You may also be unable to use a SMARTY SIM card in some dual-SIM phones if the second SIM card slot is 2G-only.

For more information, see our guide to SMARTY’s network and coverage.

5G Coverage

Unfortunately, 5G coverage isn’t yet available to customers on SMARTY. Although their website says 5G will be launching in the future, they’ve also said that the current focus is on upgrading 3G and 4G services instead.

If you’d like access to unlimited data with 5G coverage, we’d recommend getting a SIM card from Three instead. On Three, you can get a 5G-ready unlimited data SIM card for only £16 per month. You’ll then be able to access 5G coverage in the following 194 UK towns and cities:

Now Live194 towns and cities are live on Three 5G (October 2021)
Aberdeen, Abingdon-on-Thames, Adlington, Aldershot, Aldridge, Ashford, Balloch, Barnsley, Barrow-in-Furness, Basildon, Bath, Bedford, Belfast, Belfast Airport, Billericay, Billingham, Birdwell, Birkenhead, Birmingham, Bishopthorpe, Blackburn, Blackpool, Borehamwood, Bournemouth, Bradford, Brentwood, Brighton, Brimington, Bristol, Bromsgrove, Brookmans Park, Broughton Astley, Burton upon Trent, Campton, Cannock, Cardiff, Carlisle, Castlereagh, Chatham, Chelmsford, Cheltenham, Chesham, Chorley, Christleton, Clayton-le-Woods, Clifton, Coedkernew, Colchester, Copmanthorpe, Corringham, Coventry, Crawley, Crook, Cullingworth, Danderhall, Delph, Denholme, Derby, Dewsbury, Dinnington, Doncaster, Dundee, East Kilbride, East Midlands Airport, Edinburgh, Egginton, Ellesmere Port, Exmouth, Falkirk, Gateshead, Glasgow, Gorebridge, Grays, Greenock, Grimsby, Guildford, Hamilton, Hartley, Hatfield, Heanor, Heathcote, Hedge End, Hemel Hempstead, Hertford, Heswall, Heywood, Horley, Horwich, Huddersfield, Hull, Huntingdon, Inchinnan, Ingleby Barwick, Ipswich, Irlam, Isle of Grain, Iver, Kings Hill, Kings Langley, Kinmel Bay, Kirkheaton, Kirknewton, Knowl Wall, Leeds, Leicester, Leyland, Lincoln, Liverpool, London, Loughborough, Lower Stondon, Luton, Maidenhead, Maidstone, Manchester, Mansfield, Margate, Marlow Bottom, Marston Moretaine, Merthyr Tydfil, Middlesbrough, Milnrow, Milton Keynes, Motherwell, Neston, Newark-on-Trent, Newcastle, Newhall, Newport, Newquay, Newton Aycliffe, Newton-le-Willows, Newtownabbey, Normanton, Northampton, Nottingham, Nuneaton, Ottershaw, Oxford, Peterborough, Plymouth, Pontefract, Porthcawl, Portsmouth, Preston, Reading, Redcar, Redditch, Royston Yorkshire, Scunthorpe, Sheffield, Shelly Green, Shrewsbury, Slough, South Heighton, South Kirkby, South Normanton, South Ockendon, Southampton, Southend-on-Sea, Southport, St Albans, St Blazey, St Columb Road, Stafford, Stansted Airport, Stevenage, Stockton-on-Tees, Stoke-on-Trent, Stratford-upon-Avon, Sunderland, Sunninghill, Sutton-in-Ashfield, Swadlincote, Swindon, Swinton, Tamworth, Telford, Thornaby-on-Tees, Ullesthorpe, Wakefield, Wallingford, Walton-on-Thames, Warrington, Washington, Westhoughton, Weybridge, Wickford, Wigan, Winterbourne, Worcester, Worksop, Writtle, York

For more information, see our guide to 5G on Three.

International Coverage

If you’re travelling abroad to one of 35 European destinations, you can use up to 12GB of data abroad at no extra cost each month. You can also use the unlimited minutes and unlimited texts from your SMARTY plan. The following destinations are included in this offer:

Austria, Belgium, Bulgaria, Comoros & Mayotte, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, French Guiana, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Reunion, Romania, Slovakia, Slovenia, Spain, Sweden and Switzerland

If you’re travelling outside Europe, you’ll need to buy an “Out of plan” add-on. The costs for using your SMARTY SIM card outside Europe can be significantly higher. For instance, when travelling to the United States, you’ll pay 50p/minute, 20p/text and 10p/MB (equivalent to £100 per gigabyte). It isn’t possible to use your plan allowances when travelling outside Europe.

According to SMARTY’s website, you can only use your SIM card abroad for up to 60 days at a time. If you spend more than 60 consecutive days abroad, they say they may suspend your usage of the service.

For more information, see SMARTY’s web page on international roaming.

Keeping Your Phone Number

If you’d like to keep your current phone number when joining SMARTY Mobile, it’s a straightforward process to transfer it from your old mobile network.

Start by ordering your unlimited data SIM card from SMARTY’s website. To begin with, it will come with a temporary phone number assigned to it, allowing you to test out the service before moving your phone number over.

When you’re happy to move your phone number over, you’ll need to get a PAC Code from your old network. This is available through your mobile network’s website or app, or by texting PAC to 65075. You can then submit the PAC Code to SMARTY through your online dashboard. Once you’ve done that, your phone number transfer will normally take place on the next working day.

For step-by-step instructions on how to move your phone number to SMARTY, please select your current mobile network from the drop-down menu below:

PAC Code Finder: Transfer Your Phone Number to Smarty

Select your current mobile network:

  More Options

For more information on transferring your phone number between networks, see our guide to using a PAC Code.

Frequently Asked Questions

What is SMARTY’s unlimited data SIM card?
SMARTY offers a £16 unlimited data SIM card in the UK. It gives you unlimited minutes, unlimited texts and unlimited data, with no contract and no credit check required. SMARTY offers 3G and 4G coverage from the Three network.
What download speeds are available with unlimited data on SMARTY?
SMARTY offers 3G and 4G coverage. In theory, you can get up to Category 6 LTE download speeds (up to 300Mbps), but speeds will more typically be in the region of 20Mbps.

If you’d like access to 5G speeds, you’ll need to get a 5G-ready SIM card from Three instead. On Three, you’ll get unlimited data with 5G from £16 per month.

Can I use a SMARTY SIM card for mobile broadband?
Yes. SMARTY has confirmed on their website that you can use their unlimited data SIM card in devices like your tablet, mobile broadband dongle, mobile wi-fi hotspot and 4G home broadband router.
Does SMARTY offer 5G coverage?
No. SMARTY doesn’t offer any 5G coverage at present. Their website says 5G will be launching in the future, but the current focus is on improving 3G and 4G. If you’d like access to 5G, you should get a SIM card from Three instead.
How does SMARTY compare to Three for unlimited data?
On SMARTY, you’ll pay £16 for unlimited data on a one-month rolling contract with 3G & 4G speeds.

On Three, you’ll pay £16 per month for unlimited data and access to 5G. You’ll also get inclusive roaming in 71 destinations through the Go Roam offer. You will, however, need to sign up for a contract to get it.

Can I keep my current phone number?
Yes. It’s a straightforward process to keep your current phone number. Ask your old mobile network to provide you with a PAC Code. You can get one through your mobile network’s website or app, or by texting PAC to 65075. Once you’ve ordered your SMARTY unlimited data SIM card, you can provide the PAC Code to SMARTY through your online account.

More Information

For more information on SMARTY’s unlimited data plan, please see their official website.

Your Comments 44 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 44 comments from readers. You can add your own comment here.

  • george Baker said:

    Can I use Smarty in a residential property in Bath centre (a good coverage area) without having a landline to the property?

    Thanks

    • Hi George,
      Thanks for your comment. Yes, you can use a SMARTY SIM card in this way to get 4G broadband without the need for a landline. Obviously, it’s important to test it out yourself, however, to see what the coverage & speeds are like where you live.
      Hope this helps,
      Ken

  • Hi Ken,
    I am a customer of Smarty and am very pleased with them…so far. The only issue is getting answers from their customer service team. Do you, or anyone, know if I can use a Smarty SIM card in a phone that is locked to the Three network?
    thanks

    • Hi John,
      Thanks for your comment. I don’t believe Three have locked any of their phones since January 2014 so I highly suspect your phone isn’t actually locked to Three (and if it is, you can get it unlocked for free from Three). However, if it is, I believe it will probably be fine using a Smarty SIM card inside it.
      Ken

  • Hello Ken.

    Just found out that Smarty are offering unlimited data for £18 a month for a year for new customers. Offer runs until end of July. For a monthly contract this is good deal!

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