At a glance

  • Choose roaming based on the countries covered, number of days, data allowance, and call rates in your Korean carrier’s plan. Even if you’re visiting both Hong Kong and Macau, don’t assume one plan covers both on the same terms. Check the separate costs of receiving texts and making calls on your Korean number, too.
  • First check whether your phone model supports eSIM and whether it’s carrier-unlocked. Some travel eSIMs include data only and don’t come with a local phone number. If you need to call restaurants, check whether calls are included. For group trips, also check whether hotspot sharing is allowed.
  • If you choose a local SIM or eSIM, check Hong Kong’s SIM registration requirements. Travelers without a Hong Kong ID card must register with a valid identity document; this usually requires the original passport details and a copy. Complete registration in your own name through the seller’s official channel, wait for confirmation, then test whether the service is active.

Day by day

Suggested itinerary

See each day's route, highlights, background and stay together in one place.

Before departure

Check device support, countries, and calls → check when service starts → install and back up the QR code → label your Korean and travel lines

Arrive in Hong Kong

Select your travel data line → activate and register as instructed → turn off Wi-Fi and test your map and messaging apps → leave the airport

From activation to connection troubleshooting

Compare the total cost and service start date

Even plans labeled “5 days” can start counting at installation, the first connection to a local network, or a separate activation step. If a plan starts as soon as you install it, don’t activate it too early in Korea. The csl prepaid list on 2026-10-03 includes tourist SIMs at HK$58, HK$88, and HK$118. Use those prices for comparison only; check the details of your chosen plan for its actual duration, data, and calls. Compare the total cost of an overseas eSIM and Korean roaming over the same number of travel days.

Keep your Korean number and travel data on separate lines

On a dual-SIM phone, rename your Korean and travel lines so you can tell them apart. Select the travel line for data and turn off automatic data switching. Turn off data roaming on your Korean line if you don’t need it. Enable data roaming on your travel eSIM only if the seller’s instructions require it. Follow your Korean carrier’s guidance on international call and text rates and receiving verification texts.

Troubleshoot step by step at the airport

First, use the airport’s free Wi-Fi to open the seller’s instructions. Check that you selected the right data line, that the line is turned on, and that data roaming and APN settings match the instructions. Then briefly turn airplane mode on and off. APN is the network access name; don’t use a value you found online without checking. A local SIM that needs registration approval won’t work just by changing settings, so confirm that registration is complete.

Contact customer support before reinstalling

Some eSIM QR codes can only be installed once, so deleting an eSIM that won’t connect can make it harder to reinstall. Save your QR code, order number, error screen, and customer support contact details in advance. If support can’t resolve the issue, use airport Wi-Fi to check your accommodation address and first transit route, then ask for help at an official carrier store. Switching to a local SIM means paying for a new one and taking time to register it.

How to fit it in

Start your first day after you’ve tested your mobile data connection at the airport. Before departure, check which steps you can complete in advance and when service starts. After landing in Hong Kong, turn off Wi-Fi and open your map and messaging apps. Save your route to your accommodation before leaving the airport.

Reality check

Transport

Use free Wi-Fi in the airport’s main public areas as a backup if your connection fails. Save your accommodation’s English address, first transit route, and support contact so you can access them without data.

Time

Allow 20 minutes before departure to install and test, plus 30 minutes to troubleshoot locally.

Cost

Add up data, calls, hotspot use, and top-ups for your entire trip. The csl tourist SIM options listed at HK$58, HK$88, and HK$118 are one price comparison; inclusions vary by plan.

Safety

Register in your own name through the seller’s official channel using your own ID. Don’t buy SIMs from unknown sources that claim they’re already registered. Don’t post QR codes, order details, or passport photos in public channels.

If plans change

If your eSIM won’t connect

Don’t delete it. Use airport Wi-Fi to check the line, roaming, APN, and activation status. If customer support can’t resolve the issue, buy and register a new SIM at an official store.

If you’re using data faster than expected

Turn off cloud backups for photos and videos, and disable autoplay. Before buying more data, check whether the plan slows down but keeps working after its allowance or cuts off service entirely.

Small tip

If you won’t be uploading many photos or videos, reliable activation and hotspot terms matter more than the biggest data allowance.

Final check before departure

  • Check device support and carrier lock status, plus coverage in Hong Kong and Macau.
  • Check when the validity period starts, and decide how to keep your Korean number and set up travel data.
  • Safely store the documents needed for local SIM registration, along with your QR code, support details, and accommodation address.

Plan duration, speed limits, calls, hotspot use, and activation terms vary by seller. SIMs issued by local carriers won’t work until they’re registered, and approval can take time.

Information checked: 2026-10-03

Google Maps

Check the location on the map

Use Google Maps to review the location and nearby route. Recheck opening hours and prices with the official source before visiting.

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    This article links to these materials for further reading.

    Both a physical card and a mobile Octopus are convenient, but their top-up and refund processes differ. Consider device compatibility, overseas-issued cards, and battery concerns, then choose one option to keep things simple on the ground.

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    This article links to these materials for further reading.

    Large stations in Hong Kong can take a long time to reach an exit, even when you're already inside the station. Save the exit letter, connecting building, and elevator location along with the destination name so you don't get lost again above ground.

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  • Get Set Up with Octopus and the Airport Express on Day One

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