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Hutchison 3G UK Limited
Company typeSubsidiary
Founded31 August 2017; 6 years ago (2017-08-31)[1]
England, UK
Area served
United Kingdom
Key people
Elin McLean, General Manager
ProductsMobile telecommunications products and services
ParentThree UK
(3 Group) Edit this at Wikidata

SMARTY is a mobile telephone flanker brand operated by Three UK.[2] It aims to attract customers primarily looking for cheaper deals than those available direct from Three, by offering a monthly rolling SIM-only service, limited to online-only support. On some plans the operator offers to buy back unused data by means of a bill discount, a practice which is not widespread in the UK but is exhibited elsewhere such as by US carrier Ting.


SIM card package from SMARTY

All plans are monthly, with no contract, and are paid in advance by credit card, debit card, or cash via PayPoint, rather than via the more prevalent direct debit method. The company states that no credit checks are made.[3]

All plans (excluding data only plans) include unlimited UK calls and texts. In common with other networks, SMARTY offers a fixed amount of mobile data (or an unlimited amount) for a fixed monthly payment.[4][unreliable source?] It also offers "data discount" plans, where the customer pays a £5 per month service charge and buys a small number of gigabytes of data.[5] Under these plans, customers who do not use all their data allowance receive a credit on their next month's bill for unused data, calculated per megabyte at the same price as they paid for it. This credit for unused data is unique among UK mobile operators,[6] as is the unified price of data add-ons; 1 GB of data is priced the same, regardless of whether it is bought in advance as part of a customer's monthly rolling plan, or bought as an add-on which is consumed only when a customer's monthly allowance is used up. In this respect, the data discount plans are functionally equivalent to standard pay-as-you-go (PAYG) tariffs offered by other providers, such as Three's own PAYG offering, since customers only pay for the exact amount of data that they use.

Around June 2020, SMARTY introduced group plans: a group of two or more customers can share a single online account and payment method, and receive a flat 10% discount on their plan. This discount does not apply to data add-ons.

Upon launch, SMARTY offered hotspot and tethering functionality,[7][unreliable source?] although they did not offer the ability to call foreign numbers, roam abroad, or dial premium numbers.[8][unreliable source?] These features became available in 2018.[9][unreliable source?]

In early 2018, SMARTY launched a refer-a-friend program. If a customer refers a friend, both would get a free month on SMARTY. There were no limits to this, so if a customer refers one friend a month they would keep their mobile bill free.[10] In 2022, this offer was replaced with a £10 gift card for both customers.

In 2022, SMARTY rolled out data only plans which do not include any calls or texts, unlike their other plans. There are a range of plans available from 2GB per month up to an unlimited data plan.[11]


SMARTY is 'Hutchison 3G UK Limited, trading as SMARTY.'[12] SMARTY runs virtually on the 3UK mobile network, utilising operator code 23420[citation needed] and Three's IP address range. SMARTY state that there are no speed restrictions or throttling on the network, and SMARTY is not subject to Three's TrafficSense traffic management approach.[13][unreliable source?] 4G calling (VoLTE) and Wi-Fi calling (VToW) are enabled on SMARTY, using the same protocol as Three's Wi-Fi calling service and available on the same devices as Three.[14] 5G service is available in areas where Three has 5G coverage.[15]


  1. ^ "Three's Smarty network buys back your unused data each month". engadget. 31 August 2017. Retrieved 17 December 2017.
  2. ^ "Three brings Smarty to the low-cost mobile party". Financial Times. 10 August 2017. Retrieved 17 December 2017.
  3. ^ "How billing works with SMARTY". SMARTY. Retrieved 5 August 2020.
  4. ^ "SMARTY launches new Unlimited plan". uSwitch. 12 February 2019. Retrieved 15 April 2019.
  5. ^ "Plans". SMARTY. Retrieved 5 August 2020.
  6. ^ Rigg, Jamie (31 August 2017). "Three's Smarty network buys back your unused data each month". Engadget. Retrieved 5 August 2020.
  7. ^ "What is SMARTY? The new UK network explained". Recombu. 1 September 2017. Retrieved 18 December 2017.
  8. ^ "Learn about Three's Smarty and Vodafone's Voxi mobile networks". Hexus. 1 September 2017. Retrieved 18 December 2017.
  9. ^ "SMARTY goes roaming". Coolsmartphone. 9 August 2018. Retrieved 2 August 2021.
  10. ^ "Get a free month". SMARTY. 1 January 2018. Retrieved 22 February 2018.
  11. ^ "Data Only plans Perfect for tablets, dongles and mobile broadband". Retrieved 13 September 2022.
  12. ^ "SMARTY Terms And Conditions" (PDF). SMARTY. 12 April 2023. Archived (PDF) from the original on 30 June 2023. Retrieved 30 June 2023.
  13. ^ "SMARTY vs Three: all the differences between the two networks". SIM Sherpa. Retrieved 5 January 2022.
  14. ^ "What is WiFi Calling?". Retrieved 5 January 2022.
  15. ^ "Superfast 5G at no extra cost". SMARTY. Retrieved 11 May 2022.