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An eSIM is a good starting point if your phone supports it and is unlocked. For a phone without eSIM support, look at physical SIMs. Pocket WiFi is worth comparing if several of you want to share one connection.
If you need a Korean phone number, compare the call features of the plan. A physical SIM and an eSIM can both offer a number. Neither format by itself guarantees outgoing calls or access to Korean identity verification services.
Compare how each option works
| eSIM | Physical SIM | Pocket WiFi | |
|---|---|---|---|
| What you use | A plan installed on your phone | A card inserted in your phone | A separate hotspot |
| What to check first | eSIM support and carrier lock | SIM compatibility and carrier lock | Collection, return and device limit |
| Korean number and calls | Depends on the plan | Depends on the plan | Does not add a phone line |
| Travelling separately | Each phone has its own plan | Each phone has its own plan | Users need to stay near the hotspot |
| Extra equipment | None | Keep your home SIM safe if you remove it | Carry and charge the hotspot |
Does your phone support the plan?
Match your exact phone model and country of purchase with the seller’s supported device list. Do this before paying, even if a friend uses the same model name with an eSIM.
Your phone also needs to be carrier-unlocked to use another network’s SIM or eSIM. If you are unsure, ask your home carrier before buying a plan. Switching from eSIM to a physical SIM does not solve a carrier lock.
Read the installation instructions before scanning the QR code. Installation and the start of the paid usage period are not necessarily the same step. Follow the rules for the specific product you buy rather than assuming every plan starts when you land.
Do you need a Korean number?
A Korean number may matter if a host or service needs to call you locally. Check what that service asks for before choosing a plan.
You do not have to choose a physical SIM just to get a Korean number. KT’s eSIM options include plans with call and text features. KT distinguishes incoming calls and texts from outgoing service, and lists identity and entry checks for enabling those features.
For the package you select, establish:
- Does it provide a Korean number?
- Can it receive calls and texts?
- Can it make calls or send texts, and does that require extra credit?
- Is a passport or arrival check needed before those features work?
Receiving a text is not the same as passing Korean identity verification. For example, the seller of Korea eSIM Red explicitly excludes services requiring identity authentication. Do not buy a tourist SIM on the assumption that it will unlock every Korean app.
When a physical SIM makes sense
Choose a physical SIM if your unlocked phone does not support eSIM, or if the particular plan you want is supplied that way. Check that your phone has a compatible SIM slot.
If you remove your home SIM, put it somewhere secure before leaving the counter. Follow the seller’s collection instructions and check the counter’s opening hours against your arrival time.
When pocket WiFi suits a group
Pocket WiFi gives you a hotspot that several devices can connect to. It is worth comparing for people who expect to spend the day together, or for someone using a phone alongside other devices.
The practical limit is staying together. If one person takes the hotspot back to the hotel, the others no longer have that connection. Separate SIM plans can be more useful for a group that splits up.
You also need to carry and charge the device, then return it. Before booking, check the collection and return locations, opening hours, payment requirements and the number of devices allowed.
View KT pocket WiFi on Klook to check the rental conditions for your dates.
Compare eSIM products
For maps and messaging, start with the data allowance and usage period. If you plan to share data with a laptop or upload video, read the hotspot and speed conditions too. An “unlimited” label is not enough to establish either.
The listings below offer different packages. Choose the length of your stay, then read that package’s call features and activation rules. Do not assume a carrier’s general SIM features are included in every package sold under its name.
Getting ready to connect
Save the installation or collection instructions before travelling. For an eSIM, follow the seller’s instructions for when to install and activate it. For a SIM or hotspot collected at the airport, have the counter location and voucher ready.
Install the map and translation apps you plan to use.
Compare SIM and WiFi options
Choose the dates and features you need, then compare the package details. Include equipment collection and return if you choose pocket WiFi.