Three SIM Only Deals

If you're looking for the fastest 5G speeds, a Three SIM is the right choice for you. Independent tests have repeatedly shown Three delivers the fastest download and upload speeds when connected over 5G. What's more, 5G is available with all Three SIMs at no additional cost.

Three offer a range of SIMs for added flexibility, including unlimited data SIM deals. Contract lengths include 1 month, 12 months and 24 months. All Three SIMs include unlimited minutes and texts by default.

Can I get unlimited data with a Three SIM?

Yes, unlimited data deals are available on 1 month, 12 month and 24 month contracts.

There's no fair usage policy when using data within the UK, however when roaming you cannot use more than 12GB per month.

Can I use my Three SIM abroad?

You can roam in most countries with a Three SIM.

From 23rd May 2022, roaming in Europe will no longer be free. Instead, you will have to pay £2 per day, which will automatically be charged when you visit a European country. Customers who signed up for a contract before October 2021 will still be eligible for free European roaming, as long as they have not upgraded since.

For select countries outside Europe, you can get Go Roam for £5 per day, which allows you to use your allowance in 73 worldwide destinations.

For all other countries, you will be charged at a separate out of plan rate.

For a full list of destinations and more details, see Three roaming.

Can I get 5G with a Three SIM?

Yes, 5G is available for all Three customers at no additional cost. If you’re using a Three SIM, you’ll need a 5G phone in order to receive a 5G signal.

Three originally launched their 5G network in August 2021, and claim to have 50 Mhz more spectrum compared to other UK networks, for a total of 140 Mhz. They also claim to be the fastest 5G network, with independent tests carried out by Ookla.

Three is investing over £2bn into their 5G infrastructure, by adding new 5G phone masts and converting existing equipment to support the 5G spectrum.

Currently, Three has 5G in over 300 locations, which can reach 29% outdoor coverage. They plan to reach over 2,500 locations within the following years.

Here are the 300 locations you can get 5G with Three:

1. Aberdeen
2. Abingdon-On-Thames
3. Accrington
4. Adlington
5. Aldershot
6. Aldridge
7. Altofts
8. Anstey
9. Armthorpe
10. Ashford
11. Ashington
12. Aspull
13. Aughton
14. Balloch
15. Banbury
16. Barnsley
17. Barrhead
18. Barrow-In-Furness
19. Basildon
20. Basingstoke
21. Bath
22. Bedford
23. Belfast City
24. Bellshill
25. Bicester
26. Billericay
27. Billingham
28. Birdwell
29. Birkenhead
30. Birmingham
31. Bishops Stortford
32. Bishopthorpe
33. Blackburn
34. Blackpool
35. Blyth
36. Borehamwood
37. Bournemouth
38. Bracknell
39. Bradford
40. Braintree
41. Bransholme
42. Brentwood
43. Brighouse
44. Brighton
45. Brimington
46. Bristol
47. Broadbridge Heath
48. Bromsgrove
49. Brookmans Park
50. Broughton Astley
51. Buckhaven
52. Buckingham
53. Burnley
54. Burton Upon Trent
55. Bushey
56. Cannock
57. Cardiff / Caerdydd
58. Carlisle
59. Castle Donington
60. Chatham
61. Chelmsford
62. Cheltenham
63. Chesham
64. Chester
65. Chesterfield
66. Chorley
67. Christchurch
68. Christleton
69. Clayton-Le-Woods
70. Clifton
71. Colchester
72. Collingham
73. Copmanthorpe
74. Corringham
75. Coventry
76. Crawley
77. Crewe
78. Crook
79. Crumlin
80. Cullingworth
81. Danderhall
82. Denholme
83. Derby
84. Dewsbury
85. Dinnington
86. Doncaster
87. Dordon
88. Dundee
89. Durham
90. Earls Barton
91. East Kilbride
92. Eastleigh
93. Eaton Socon
94. Edinburgh
95. Ellesmere Port
96. Erskine
97. Exmouth
98. Falkirk
99. Faversham
100. Felixstowe
101. Formby
102. Frodsham
103. Gateshead
104. Gerrards Cross
105. Glasgow
106. Gloucester
107. Golborne
108. Gorebridge
109. Grays
110. Great Harwood
111. Greenock
112. Grimsby
113. Guildford
114. Halifax
115. Hamilton
116. Harpenden
117. Harrogate
118. Hartley
119. Hatfield
120. Heanor
121. Heathcote
122. Hedge End
123. Hemel Hempstead
124. Hemsby
125. Hertford
126. Heswall
127. Heywood
128. Hilton
129. Horley
130. Horwich
131. Hoyland
132. Huddersfield
133. Huntington
134. Inchinnan
135. Ingleby Barwick
136. Ipswich
137. Irlam
138. Iver Heath
139. Keighley
140. Kimberley
141. Kings Langley
142. Kingston Upon Hull
143. King’S Hill
144. King’S Stanley
145. Kinmel Bay / Bae Cinmel
146. Kirkcaldy
147. Kirkham
148. Kirkheaton
149. Kirkliston
150. Kirknewton
151. Leeds
152. Leicester
153. Leigh
154. Leyland
155. Lincoln
156. Littlestone-On-Sea
157. Liverpool
158. Livingston
159. Loanhead
160. Locks Heath
161. Loftus
162. London
163. London Colney
164. Loughborough
165. Lower Stondon
166. Lowestoft
167. Luton
168. Lutterworth
169. Maidenhead
170. Maidstone
171. Manchester
172. Mansfield
173. Margate
174. Marlow Bottom
175. Marston Moretaine
176. Maylandsea
177. Merthyr Tydfil / Merthyr Tudful
178. Metropolitan Castlereagh
179. Metropolitan Newtownabbey
180. Middlesbrough
181. Milnrow
182. Milton Keynes
183. Mirfield
184. Moorends
185. Mossley
186. Motherwell
187. Nelson
188. Neston
189. New Rossington
190. Newark-On-Trent
191. Newbridge
192. Newcastle Upon Tyne
193. Newhall
194. Newport / Casnewydd
195. Newport: Gwent
196. Newquay
197. Newton Abbot
198. Newton Aycliffe
199. Newton-Le-Willows
200. Newtown / Y Drenewydd
201. Normanton
202. Northampton
203. Norwich
204. Nottingham
205. Nuneaton
206. Offerton Green
207. Oldham
208. Ottershaw
209. Oxford
210. Perth
211. Peterborough
212. Plymouth
213. Pontefract
214. Porthcawl
215. Portsmouth
216. Poulton-Le-Fylde
217. Preston
218. Queensferry
219. Ramsbottom
220. Rawtenstall
221. Reading
222. Redcar
223. Redditch
224. Redhill
225. Reigate
226. Rhondda
227. Rochester
228. Rothwell
229. Rottingdean
230. Royston
231. Rugeley
232. Rushden
233. Sawston
234. Scunthorpe
235. Seaton Carew
236. Sheffield
237. Shefford
238. Shelly Green
239. Shildon
240. Shrewsbury
241. Sittingbourne
242. Skelton
243. Slough
244. South Heighton
245. South Kirkby
246. South Normanton
247. South Ockendon
248. South Woodham Ferrers
249. Southampton
250. Southend-On-Sea
251. Southport
252. Spennymoor
253. St Albans
254. St Blazey
255. St Columb Road
256. Stafford
257. Stainforth
258. Stapenhill
259. Stevenage
260. Stocksbridge
261. Stockton-On-Tees
262. Stoke-On-Trent
263. Stratford-Upon-Avon
264. Sunderland
265. Sunninghill
266. Sutton Coldfield
267. Sutton In Ashfield
268. Swadlincote
269. Swansea / Abertawe
270. Swindon
271. Swinton
272. Tamworth
273. Taunton
274. Telford
275. Thatcham
276. The Mumbles
277. Thornaby-On-Tees
278. Tonbridge
279. Totton
280. Wakefield
281. Wallingford
282. Walton
283. Wanstead
284. Warrington
285. Washington
286. Weeping Cross
287. Wells
288. Westhoughton
289. Weybridge
290. Whitburn
291. Wickford
292. Wigan
293. Windsor
294. Winterbourne
295. Wolverhampton
296. Worcester
297. Worksop
298. Writtle
299. Yeovil
300. York

Can I get a Three SIM if I have a bad credit rating?

It depends on the contract length and how low credit rating is. Most people with a bad credit rating are likely to get a 1 month rolling SIM contract with Three, however you may find difficulty in being accepted for a 12 month or 24 month contract.

Three 1 month SIMs

If you don’t want to be tied to a long contract, Three offer 1 month rolling SIM contracts.

All Three 1 month SIMs come with unlimited minutes and texts, with data ranging from 4GB to unlimited.

You can cancel a Three 1 month SIM at any time you want. You can also change your plan to a lower or higher cost tariff whenever you like.

Do I need to unlock my phone to use a Three SIM?

If you bought your phone from Three, or it originally came with a Three SIM, then you shouldn’t need to unlock your phone in order to use a Three SIM.

Since December 2021, it is illegal for any network to sell a mobile phone that is locked to a specific network.

If you bought your phone before this date, it may be locked to your current network. If you’re unsure if your phone is unlocked, simply insert a SIM from a different network - if your phone is locked, an error message will be shown.

All providers must unlock your phone for free. You will need to contact your current network to do this. They will ask for your IMEI number, which you can obtain by dialing *#06# from your phone.

What size SIM cards can I get with Three?

Three offers all SIM cards sizes, and are currently trialing eSIMs. You will be sent a standard SIM card size, which will have cutouts to be broken down to a micro SIM or nano SIM. eSIMs with Three are not widely available, and are in a trial phase with select customers.

1. Standard - the largest SIM card size, which is generally used with older non-smartphones. Newer phones are likely to use micro or nano SIMs.

2. Micro - Once considered a smaller replacement for standard SIMs, micro SIMs are less prevalent today, being replaced by the even smaller nano SIM. Older smartphones or budget phones may still use a micro SIM.

3. Nano - The smallest and most common SIM card size used in phones sold today. Used by the newer iPhones and Samsungs.

4. eSIM - A digital SIM card. eSIMs are still a new technology, and are not commonly used in the UK right now. Three are currently trialing eSIM technology for compatible phones such as the Apple iPhone 15. Three have not announced when eSIMs will be generally available.

Can I switch from my current network to a Three SIM?

Yes, it’s easy to switch to Three. From your current network, text PAC to 65075 for free. You will receive a reply text within 5 minutes, which will contain your PAC code.

You will need to give this PAC code to Three. You can do this at the time of purchase, or by contacting Three after you have received your Three SIM card.

After you have given your PAC code to Three, they will begin the switch or your behalf, which normally takes 3 working days. Once the switch has completed, you will lose signal with your current network. When this happens, you can insert your Three SIM to complete the switching process.

For more information, see transferring your phone number to a new network.

Does Three have good coverage?

Three has very good coverage. As the 4th largest network in the UK, they are able to deliver 4G to 99.9% of the population. With 140MHz 5G spectrum, Three claim they are the fastest 5G network, with tests independently carried out by Ookla.

As the name might suggest, Three originally started as the UK’s first 3G network - a claim which they still hold to this day. However, as 3G becomes more obsolete, Three have been upgrading their existing infacturutre and phone masts to support 4G and 5G connectivity.

You can check the signal strength you will receive from your location by entering your postcode into the Three coverage checker tool. You will also be able to see a breakdown of each spectrum, with information about 3G, 4G and 5G.

Is Three a fast network?

In a recent independent test by Opensignal, Three is the second fastest network in the UK, only beaten by EE.

Average download speeds were 25.2 Mbps, with upload speeds of 6.3 Mbps. As for 5G, they also came in second place, with average download speeds of 80.2 Mbps and upload speeds of 9.8 Mbps.

According to Ookla, their late 2021 Speedtest Intelligence tests showed Three to be the fastest 5G network, with median download speeds of 258.80 Mbps and median upload speeds of 13.94 Mbps. The majority of tests were carried out in London, Birmingham and Manchester.

How reliable is Three?

Despite being the smallest major UK network, Three deliver a very reliable service, with minimal downtime when compared to the other major networks.

In mid February 2022, Three suffered from a network outage across the UK, with particular disruption in London. Customers were unable to make calls and texts, with some left without internet. However, normal service was resumed by the end of the day.

Apart from the unavoidable minor disruptions, Three has not had any major downtime in recent years.

Does Three have good customer service?

Three has fairly good customer service, with help available over the phone, online via webchat and from their physical stores.

90% of Three’s call centres are located within India (Mumbai and Pune), with the remaining in Scotland (Glasgow).

Three’s call centres are open 7 days a week, from 8am to 8pm on weekdays and 9am to 8pm on weekends. Calling Three is free, however calling from abroad may incur charges.

• From a Three phone: 333
• From any other phone: 0333 338 1001
• From abroad: +44 7782 333 333

You can also use their live chat service, which is open 8am to 10pm on weekdays and 9am to 8pm on weekends.

Help is also available through the Three app on Android and iOS, where you can view your account status and billing information.

You can find your nearest store by entering your postcode into the Three storage locator.

In Ofcom’s recent pay monthly mobile complaints data for July 2021 to September 2021, Three received an average of 3 complaints per 100,000 customers. This is slightly higher than the average of 2 complaints.

Three+ rewards

In December 2021, Three launched their rewards app called Three+.

Three+ is a loyalty scheme available for all Three customers, with offers from several brands, including Cineworld and Uber Eats.

As well as access to presale tickets for major concerts and events, you can also get discounts and freebies from the following companies:

• Uber Eats - 20% off your order
• CineWorld - £3 ticket on weekends
• Frankie & Benny’s - 2 mains for £10
• Bloom & Wild
• Chelsea FC
• Chiquito
• Days Out+
• Picture House
• Love Theatre
• Readly
• Simply Cook
• The Telegraph

The Three+ app is available for Android and iOS devices.

Three Add-ons

If you’re running low on data, minutes or texts, you can purchase a separate add-on to get more allowances.

You can purchase a Three add-on through My3 or by the Three app.

FAQs