Travel eSIM vs Roaming vs Local SIM vs Pocket Wi-Fi
There are four common ways to stay online abroad: your home carrier's roaming package, a travel eSIM, a local SIM card bought on arrival, and a rented pocket Wi-Fi router. None of them is right for every trip. The right choice depends on whether your phone supports eSIM, whether you need a local number, and how many people need to share the connection.
The four options side by side
| Home roaming | Travel eSIM | Local SIM card | Pocket Wi-Fi | |
|---|---|---|---|---|
| Setup | Usually automatic or one opt-in | Install at home by QR code | Buy and swap after landing | Collect and return the device |
| Local phone number | No (you keep your own) | Usually no | Usually yes | No |
| Keeps your home number active | Yes | Yes, on dual SIM phones | Only on dual SIM phones | Yes |
| Works for several people | Each person pays separately | Each person, or a hotspot | Each person, or a hotspot | Yes, several devices at once |
| Extra device to carry and charge | No | No | No | Yes |
| Needs eSIM-capable phone | No | Yes | No | No |
| Risk of losing something | None | Low | Your home SIM card | The router, which may carry a fee |
Home carrier roaming
Roaming is the zero-effort option: your phone just works when you land, with your own number. Some carriers include international data in certain plans, or sell daily or weekly passes. The main drawbacks are cost and allowance. Roaming packages are often more expensive per gigabyte than a travel eSIM and may slow you down after a set amount. Check the exact terms on your carrier's website, including whether a daily fee starts as soon as you use any service.
Good for: short trips, people who don't want to touch settings, and work phones where the employer pays.
Travel eSIM
A travel eSIM is a separate data plan you install alongside your home line. You land connected, without a queue, and your home SIM stays in the phone for texts. The trade-offs are that your phone must support eSIM and be unlocked, and most plans don't include a local number. Routing can also affect some apps, as what a travel eSIM is explains.
Good for: most solo and couple trips, multi-country trips, and anyone who wants to keep receiving bank codes on their home number.
Local SIM card
A local SIM gives you a local number and local pricing, and it's often good value for long stays. You usually buy it at an airport counter or a phone shop, and SIM registration typically requires your passport. If your phone has only one physical SIM slot, your home SIM comes out, so keep it somewhere safe and expect to miss texts to your home number.
Good for: long stays, people who need a local number, and phones without eSIM support. Our Taiwan and Thailand guides compare airport SIMs with eSIMs for those destinations.
Pocket Wi-Fi
A pocket Wi-Fi router connects to the local network and creates a Wi-Fi hotspot for several devices. It's popular for families and groups, and it works with any phone or tablet. The downsides: the person carrying it has to stay with the group, it needs charging every day, and you have to collect and return it. Lost or damaged routers usually carry a fee. Your phone also can't receive texts to your home number unless your home line stays on separately.
Good for: groups travelling together all day, older phones, and tablets or laptops that need a connection.
Which should you choose?
| Your trip | Usually the simplest choice |
|---|---|
| Solo city break, modern phone | Travel eSIM |
| Couple travelling together | A travel eSIM each, or one eSIM plus hotspot |
| Family of four, kids with tablets | Pocket Wi-Fi or one larger eSIM shared by hotspot |
| Long stay of a month or more | Local SIM card |
| Work trip, company phone | Home roaming, if your employer covers it |
| Phone without eSIM support | Local SIM card or pocket Wi-Fi |
Whatever you choose, estimate your data first with our data guide. If you go with an eSIM, keep your home number working with the dual SIM setup.
FAQ
Is a travel eSIM cheaper than roaming?
Often, per gigabyte, but not always. Some home plans include generous international data. Compare your carrier's current terms with the eSIM plan for your trip length.
Can I use an eSIM and a pocket Wi-Fi together?
Yes. Some families give the router to the group and keep a small eSIM on one phone as a backup for when the group splits up.
Do I need a local phone number abroad?
Rarely, for short trips. You need one when local businesses insist on calling, or when a local app requires a local number to sign up.
Which option is best for a phone that doesn't support eSIM?
A local SIM card or a pocket Wi-Fi router. Roaming also works if your carrier's rates suit you.
Does a pocket Wi-Fi work better in rural areas?
It connects to the same local networks as a SIM or eSIM, so coverage depends on the network it uses rather than on the device.