SIM cards and
mobile plans
for travel
HelloRoam's 19 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.
19 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?
Check that your phone supports eSIM and is unlocked before you buy.
UK networks, explained
Plans, prices and roaming rules for the SIM only deals travellers ask about most.
- Tesco Mobile4 guidesTesco Pay as You Go SIM: Complete Guide for UK Travellers in 2026
- SMARTY4 guidesSMARTY SIM Only Deals Explained: Plans, Pricing and What You Get
- O22 guidesO2 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 | Newest guide | Updated |
|---|---|---|---|
| Tesco Mobile | 4 guides | Tesco Pay as You Go SIM: Complete Guide for UK Travellers in 2026 | |
| SMARTY | 4 guides | SMARTY SIM Only Deals Explained: Plans, Pricing and What You Get | |
| O2 | 2 guides | 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 |
Popular questions
- How does an eSIM actually work? Answered in: What is an ESIM? the Complete Guide for UK Travellers in 2026
- 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
Pages that help you choose and set up an eSIM.
All SIM card guides
19 · newest first
Turkey
Vietnam
HelloRoam eSIM
