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Coverage in Japan and South Korea
Each country has its own plan, and both are on the Asia plan, useful if your trip continues elsewhere in the region. Both use the kroly APN, so set it before you connect, and it's the same setting for both if you travel between them.
More detail
Japan and South Korea have dense, modern networks, including on high-speed rail and in metro systems, so day-to-day connection is rarely the problem there. Set the APN once and you're done; the table and the path for your phone are in your add guide under Setting your APN. If you land and have full bars but nothing loads, the APN is the first thing to check; see Full bars but nothing loads: signal without data.
For a trip that takes in both, or continues to Taiwan, Hong Kong, or Southeast Asia, the Asia plan covers the route on one plan and switches networks at each border. Mainland China has its own rules; see Coverage in China.
The signal is strongest around cities, airports, and main routes and thins in rural and remote areas, the same as at home. Each country's page says where, and names the networks your plan uses there. See What to expect from coverage, city to countryside. Your plan starts when you connect in a supported country, not when you buy. Your validity days count from that first connection. Unused data expires at the end of your validity period. It doesn't roll over.
Foire aux questions
KnowRoaming partners with top-tier local networks to provide strong connectivity in urban areas and travel hubs. While rural performance can vary depending on the country, travelers typically enjoy excellent service in major cities and popular destinations.
Be advised that after activation, both eSIMs and regular SIM cards are capable of functioning even when not connected to the internet. This implies that both types of SIM cards can be used with your device for making calls, sending texts, and other activities that do not require an internet connection.
Yes. KnowRoaming covers 200+ destinations, and a single Global eSIM connects in 144 of them, so you can cross borders without switching or changing SIMs. Regional plans for Europe, Asia, Africa, the Caribbean, LATAM, and more work the same way.
Yes, KnowRoaming offers eSIM plans that work across multiple countries, so you can stay connected without buying a new SIM card in each destination. Whether your family is visiting three countries in Europe or hopping between islands, one KnowRoaming eSIM can keep you online for maps, translations, and entertainment in over 200 destinations.
Le moteur de recherche est efficace, la documentation est plutôt bonne, mais parfois, on a simplement besoin de parler à quelqu'un. C'est pour ça que nous sommes là. Quel que soit le fuseau horaire, quelle que soit la question, à toute heure.
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