Three's 10-day option is £80. A Slashtel eSIM with at least 10GB for the same trip is £9.19. Keep your Three number for calls and texts.
Buy the China eSIM →Three's 10-day Go Roam Around the World Extra daily charge option costs £80 (£8/day x 10 days). A Slashtel data eSIM for China with at least 10GB for 30 days costs $12.29, about £9.19, so £70.81 less. The eSIM is data only: keep your UK SIM in the phone for calls and texts. Three prices checked on three.co.uk on 26 October 2026.
| Three | Includes | Slashtel eSIM (same days or more) | Difference |
|---|---|---|---|
| £24 · 3 days£8/day x 3 days | £8/day x 3 days | 3GB, 15 days: $3.89 (≈£2.91) | £21.09 less |
| £40 · 5 days£8/day x 5 days | £8/day x 5 days | 5GB, 30 days: $7.09 (≈£5.30) | £34.70 less |
| £56 · 7 days£8/day x 7 days | £8/day x 7 days | 10GB, 30 days: $12.29 (≈£9.19) | £46.81 less |
| £80 · 10 days£8/day x 10 days | £8/day x 10 days | 10GB, 30 days: $12.29 (≈£9.19) | £70.81 less |
| £17.50 · 3 daysCovers all Go Roam bands. Also 5-day £29.75, 7-day £42, 14-day £84. | Covers all Go Roam bands. Also 5-day £29.75, 7-day £42, 14-day £84. | 3GB, 15 days: $3.89 (≈£2.91) | £14.59 less |
Three prices from three.co.uk, checked 26 October 2026; Three's options include calls as well as data. Where Three charges by the day, we compare an eSIM with at least 1GB a day. Country bands from the 'All bands when roaming abroad' table in the Three Your Way price guide (post 19 April 2026, published 12 Oct 2026). Ireland and Isle of Man are excluded from the daily charge. Older plan cohorts have different daily charges (the post-18 Dec 2025 guide applies to those customers). Worldwide data roaming limit £45 ex VAT by default. Data Passport £7/day is closed to new purch Slashtel prices are live, in US dollars, converted at 0.75 per $1 (daily reference rate); your card is charged in your own currency at checkout. Three is a trademark of Hutchison 3G UK Limited. Slashtel is not affiliated with Three.
Yes, Three roams in China, at £80 for 10 days on its Go Roam Around the World Extra daily charge option (checked 26 October 2026). A travel eSIM gives you local data there instead, while your Three number stays active for calls and texts.
For data, the eSIM. Three's 10-day option is £80; a Slashtel eSIM with 10GB for 30 days is $12.29 (about £9.19). Three's option also includes calls, which the eSIM does not.
Yes. The eSIM is added alongside your Three SIM, so your number stays in the phone for calls and texts such as bank codes. Set the eSIM as the line for mobile data and turn data roaming off on the Three line. Whether Three charges for anything you receive abroad depends on your plan, so check with Three before you travel.
No. It is data only, with no phone number. You can call on WhatsApp, FaceTime or similar apps over the eSIM data.
Most iPhones from the XS onwards, Google Pixel 3 and later, and recent Samsung Galaxy S, Z and A models, provided the phone is not carrier-locked. Check under Settings for an option to add an eSIM.
Install it at home before you fly, while you have Wi-Fi, and switch mobile data to it when you land.