United Kingdom 50GB 30 days
EE / 3
- Data
- 50GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$26.90$25.55
Three UK and travel eSIM in United Kingdom
Three UK is one of the networks your eSIM may use in United Kingdom. Here is who actually decides which network you get, and what to do with that.
Author: Porsch Kunnipat Siramanakul · Co-founderReviewed by: Bob Kanokphon ThongdeePublished: October 12, 2026Last updated: October 12, 2026
Quick answer
- 33 of the 100 United Kingdom plans we sell name Three UK as a reachable network, at 5G.
- Three runs LTE on B1, B3, B20, B32 and 5G on n78; your phone needs at least one of them.
- Travel plans connect by roaming, so no plan can promise one specific network.
Three UK in brief
Three UK merged with Vodafone UK in 2025 to form VodafoneThree, and Three's site says it now runs on the combined Vodafone and Three network.
We are not a reseller for this operator and we have not run our own field speed tests. The band and network details below come from the sources listed at the end of the page.
Three's bands and technology
| Item | Three |
|---|---|
| LTE (4G) | B1, B3, B20, B32 |
| 5G NR | n78 |
| 5G launched | Live |
| 3G | Shut down |
| Network code (MCC-MNC) | 234-20 |
Checked against the sources on 2026-10-12. Only the bands a source confirmed are listed; the network may run others too.
An eSIM can only use Three if your phone supports at least one band in this table. Before you fly, open your model's spec page on the maker's site and compare its LTE and 5G band lists.
Three's coverage map
Three publishes its own coverage map. Look up the street or district you will stay in rather than the country as a whole, because coverage in town and out of town differs a great deal. The map shows Three's own network; a roaming plan may not get every technology it shows.
Who licenses Three
Mobile networks in United Kingdom are licensed, and their spectrum assigned, by the Office of Communications (Ofcom). The bands above are the ones it allocates. A problem with the local network's own service goes to the operator first; a problem with your eSIM plan comes to us.
The plans on our shelf that name Three UK
From the supplier record behind each package, 33 of the 100 plans we currently sell for United Kingdom declare Three UK as a network the profile can reach, at 5G. The figure comes from the same catalogue that prices the plan pages, and it moves when the supplier revises the record.
A plan naming Three UK means the network sits in the list the profile may choose from. It does not mean your handset will stay on it. The priority order is the supplier's, and the signal where you stand decides.
Three beside the other networks in United Kingdom
| Network | LTE bands | 5G bands |
|---|---|---|
| Three UK | B1, B3, B20, B32 | n78 |
| EE | B1, B3, B7, B20 | n78 |
| O2 | B1, B3, B8, B20, B40 | n78 |
| Vodafone UK | B1, B3, B7, B8, B20, B32, B38 | n78 |
A band shared across networks is one a single phone can use on all of them.
Why plans do not name a fixed network
Nearly every travel eSIM is a roaming product: the profile picks a network by an order the supplier sets, not by the buyer. If Three UK is weak where you are, try selecting EE or O2 or Vodafone UK manually in the network settings, and keep data roaming on for the eSIM profile.
FAQ
Will my eSIM definitely connect to Three UK?+
33 of our plans name Three UK as reachable, but that is not a guarantee. Travel plans run over roaming agreements, so the network depends on the supplier behind the plan, your device and where you are.
Which bands does my phone need for Three?+
At least one of these, LTE: B1, B3, B20, B32; 5G: n78. Your phone's band list is on the maker's spec page for your model, under "Cellular" or "Network".
Does Three UK run 5G, and will my plan get it?+
Yes. Three has run commercial 5G, on n78. A travel plan only gets it when the plan permits 5G, your phone supports one of those bands, and you are inside 5G coverage. Miss any one and you fall back to 4G.
How do I see which network I am on?+
Check the carrier name at the top of the screen, or open the mobile-network settings and look at the operator list. If signal is poor, try selecting a network manually instead of automatic, but only one your plan actually supports.
Sources
- Three UK coverage checker — Three UK, October 11, 2026
- Three UK homepage — Three UK, October 11, 2026
- kenstechtips: UK network frequency bands — Ken's Tech Tips, October 11, 2026
- Wikipedia: VodafoneThree — Wikipedia, October 11, 2026
- Mobile network codes in ITU region 2xx (Europe) — Wikipedia, October 12, 2026
- Ofcom: UK cellular operators spectrum licences (search result) — Ofcom, October 11, 2026
About the author
Porsch Kunnipat Siramanakul
- Co-founder of eSIMonline.asia
- Digital marketer
- Performance marketing and marketing planning
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