Do Korea, China, Japan, Europe and USA eSIMs work on iPhone and Samsung
Device by destination questions: check eSIM support and carrier lock first, market-variant caveats (such as some China and Hong Kong market models), install path on iPhone versus Samsung, and roaming toggle and network selection notes per destination.
한눈에 보기
- The destination does not decide which phone can use an eSIM. What decides it is your phone's model and version, the market it was sold in and any carrier lock. Many recent iPhone and Samsung models support eSIM, but some models sold in certain markets (such as some for mainland China and Hong Kong) can differ, so check your own phone before buying an eSIM for any destination.
- The fastest way is our device checker and your phone's own Settings screens, then follow the iPhone or Samsung install steps below.
Check before buying: eSIM support and carrier lock
Two conditions apply the same way to every destination. First, the phone must support eSIM. Second, it must not be locked to your original carrier's network. If it is locked, a foreign eSIM may not install or work.
- iPhone: go to Settings > General > About and look at the Carrier Lock line and EID details. See our EID guide.
- Samsung: go to Settings > Connections > SIM manager (menu names can differ by model and version) and see whether there is an option to add an eSIM.
- If unsure about the carrier lock, ask your original operator directly.
Market variants: what to watch for
Some makers sell the same model name in different markets with different hardware. A commonly mentioned example is models sold for mainland China, which may not support eSIM the way international models do, and some models sold in Hong Kong and Macau differ in some respects too, so a model name alone may not be enough.
- Find the full model number in Settings > About and look up that model code's eSIM support on the maker's official site.
- If the phone is second-hand or imported, check both the market it was sold in and any carrier lock.
- If you are unsure, plan a backup such as a physical SIM or pocket WiFi for the trip.
Installing an eSIM on iPhone versus Samsung
| 단계 | 아이폰 | Samsung |
|---|---|---|
| Open the menu | 설정 > 모바일 서비스(또는 셀룰러) > eSIM 추가 | 설정 > 연결 > SIM 관리자 > eSIM 추가 |
| Scan or enter details | Scan the QR from your email or enter details manually | Scan the QR from your email or choose manual entry |
| Label and choose lines | Name it, for example Travel, and choose it for mobile data | Name it and set it for mobile data |
| Switch on data roaming | Turn on Data Roaming for the eSIM line at your destination | Turn on Data roaming in the eSIM line's mobile network menu |
Menu names may differ by version
Detailed steps with pictures are in our how-to-install-eSIM guide. If you run two lines at once, set the eSIM as the data line and your main SIM for voice and SMS so you can still receive OTP, subject to your operator's terms.
By destination: Korea, China, Japan, Taiwan, Hong Kong, Singapore, Europe, USA
| 여행지 | 확인할 사항 |
|---|---|
| Korea (iPhone and Samsung) | Check eSIM support and lock; install before flying and switch on roaming on arrival |
| China (iPhone and Samsung) | Watch mainland China market models and check the full model number; app behaviour depends on the plan. See our China eSIM without VPN article |
| Japan (Samsung and iPhone) | Check the phone and lock; read the plan page about the network it connects to |
| Taiwan (iPhone) | Same steps as elsewhere; set the data line correctly |
| Hong Kong (iPhone) | Watch models sold in Hong Kong and Macau; check the full model number |
| Singapore (iPhone) | Standard steps; check data roaming and select the network if the signal is odd |
| Europe (iPhone and Samsung) | Check the plan covers every country on your route; see our multi-country eSIM guide |
| USA (iPhone) | Check eSIM support, roaming and network selection if it will not connect |
Data roaming and network selection on arrival
A travel eSIM often needs data roaming switched on for the eSIM line to work, but turn off data roaming on your main SIM if you do not want it to incur charges by accident. If it still will not connect, try choosing the network manually as indicated on the plan page.
- 1데이터 회선을 eSIM으로 설정On iPhone choose the eSIM for Mobile Data. On Samsung choose it for Mobile data in SIM manager.
- 2Turn on data roaming on the eSIM lineFollow what the plan page recommends.
- 3Turn off data roaming on the main SIMThis helps avoid accidental charges. See our roaming bill shock guide.
- 4Pick the network manually if neededTurn off automatic network selection and pick the network named on the plan page, or wait a moment and restart the phone.
If you only see an SOS status or the signal keeps dropping, read our guide on eSIM showing SOS or keeps dropping.
자주 묻는 질문
자주 묻는 질문
Does a Korea eSIM work on iPhone?+
If your iPhone supports eSIM and is unlocked, install via Settings > Mobile Service > Add eSIM, then switch on data roaming in Korea as the plan page says.
Does a China eSIM work on iPhone?+
Yes if the phone supports eSIM, but watch models sold for mainland China, which can differ. Check the full model number. Which apps work depends on the plan; see our China eSIM without VPN article.
Does a Taiwan eSIM work on iPhone?+
Yes if the iPhone supports eSIM and is unlocked. Install through Add eSIM and set the data line correctly.
Does a Hong Kong eSIM work on iPhone?+
Usually yes if supported, but watch models sold in Hong Kong and Macau, which can differ in some respects. Check the full model number and carrier lock.
Does a Singapore eSIM work on iPhone?+
Yes if the iPhone supports eSIM and is unlocked. Install before flying and switch on roaming on arrival. See the plan page for the latest terms.
Does a Europe eSIM work on iPhone and Samsung?+
Yes on both brands if the phone supports eSIM and is unlocked. The key is that the plan must cover every country you visit, so check the country list on the plan page.
Does a USA eSIM work on iPhone?+
Yes if the iPhone supports eSIM and is unlocked. Install via Add eSIM and switch on data roaming as the plan page says. If it will not connect, try choosing the network manually.
Do Japan, Korea and China eSIMs work on Samsung?+
Many Samsung models support eSIM, but menu names differ by model and version. Check Settings > Connections > SIM manager and the model number. Models sold for mainland China deserve extra checking.
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