Comparison
Three (UK) Go Roam vs Anon eSIM
Three's Go Roam has a 12 GB monthly fair-use cap abroad and covers ~70 destinations. Anon eSIM has no roaming cap and works in 200+ countries.
Winner: Anon eSIM
Go Roam lets Three customers use their UK allowance abroad, which sounds ideal until you read the fair-use policy: roaming data is capped at 12 GB per month regardless of your plan size, speeds are frequently deprioritized on partner networks, and the destination list (~70 countries) misses large parts of Asia, Africa, and the Americas. Outside Go Roam destinations you pay Three's standard roaming rates, which are punitive.
Three (UK) Go Roam vs Anon eSIM: side by side
| Three (UK) Go Roam | Anon eSIM | |
|---|---|---|
| Data abroad | 12 GB/month fair-use cap, then charged or blocked | No cap - pay per MB from your balance |
| Destinations | ~70 Go Roam destinations; standard rates elsewhere | 200+ countries on one eSIM and one balance |
| Requires | An active Three UK plan and UK billing identity | None. No account, no email, no name, no ID |
| Hotspot | Allowed, but counts against the roaming cap | Included at full speed on every plan |
| Cost model | Bundled with your monthly plan | $0.70–$2.80/GB by country (UK $0.90, US $1.40, Thailand $0.70); $5 one-time per eSIM; top-ups are fee-free |
| Expiry | Allowance resets monthly | Never - prepaid USD balance carries over forever |
Where Three (UK) Go Roam wins
- If you're already a Three customer and stay under 12 GB in a Go Roam country, roaming costs you nothing extra.
- You keep your UK number for calls and texts while roaming.
Where Anon eSIM wins
- No 12 GB ceiling - long trips and heavy use just draw down a balance you control.
- Works in 130+ countries Go Roam doesn't cover, at the same predictable per-GB pricing.
- No contract or UK plan required, and no identity attached to your travel data.
The verdict
Keep Go Roam for short hops to covered countries if you're on Three anyway. For anything longer than a week, heavier than 12 GB, or outside the Go Roam list, a $10–$20 Anon eSIM top-up is cheaper and cap-free - and your primary SIM stays live for calls.
Frequently asked
What happens when I hit Three's 12 GB roaming cap?+
Three either blocks roaming data or charges add-on rates, depending on plan. An Anon eSIM sidesteps the cap entirely: install it alongside your Three SIM and switch data over when you need it.
Can I run Anon eSIM and my Three SIM at the same time?+
Yes. Every eSIM-capable phone supports dual SIM. Keep Three active for calls/texts and set Anon eSIM as the data line.
Is Anon eSIM cheaper than Go Roam?+
Go Roam is 'free' within its cap if you already pay for a Three plan. Beyond the cap or outside covered countries, Anon eSIM's $0.70–$2.80/GB beats Three's standard roaming rates by a wide margin.