SIM cards and
mobile plans
for travel
HelloRoam's 15 guides compare the ways to stay online on a trip: your UK mobile plan, a SIM only deal, or a travel eSIM. HelloRoam sells eSIMs for 185+ countries. New to eSIMs? Start with what an eSIM is.
15 guides
Start with the basics
What an eSIM is, how a travel eSIM works, and how it compares with a SIM card.
Will your phone work abroad?
Before you buy, check your phone supports eSIM and isn't locked to your UK network.
UK networks, explained
Plans, prices and roaming rules for the SIM only deals travellers ask about most.
- Tesco Mobile1 guideTesco Pay as You Go SIM: How It Works, What It Costs, and When to Switch
- SMARTY1 guideSMARTY SIM Only Deals Explained: Plans, Pricing and What You Get
- O21 guideO2 SIM Only Deals Explained: Which Plan is Right for You in 2026
- Any UK network1 guideCheap SIM Only Deals UK 2026: How to Cut Your Mobile Bill
| Network | Guides | Latest guide | Updated |
|---|---|---|---|
| Tesco Mobile | 1 guide | Tesco Pay as You Go SIM: How It Works, What It Costs, and When to Switch | |
| SMARTY | 1 guide | SMARTY SIM Only Deals Explained: Plans, Pricing and What You Get | |
| O2 | 1 guide | O2 SIM Only Deals Explained: Which Plan is Right for You in 2026 | |
| Any UK network | 1 guide | Cheap SIM Only Deals UK 2026: How to Cut Your Mobile Bill |
What travellers ask
- How does an eSIM actually work? Answered in: What is an eSIM? How It Works Abroad for UK Travellers
- What is a travel eSIM? Answered in: What is a Travel eSIM? The UK Traveller's Complete Guide for 2026
- What if my eSIM QR code won't scan? What is an eSIM?
- Does an eSIM work across Europe? Answered in: eSIM for Europe: The UK Traveller's Complete Guide (2025)
- How do SMARTY SIM only deals work? Answered in: SMARTY SIM Only Deals Explained: Plans, Pricing and What You Get
Next steps
Handy pages for choosing an eSIM and getting it set up.
All SIM card guides
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Turkey
HelloRoam eSIM
