How to Set Up Your Taiwan eSIM (Step-by-Step Guide)

Setting up a Taiwan eSIM is genuinely easy — most travelers are done in under five minutes, and the whole point is that you can do it at home before you fly so your phone connects automatically the moment you land at Taoyuan or Songshan Airport. This step-by-step guide walks you through checking compatibility, installing the profile on iPhone and Android, switching it on when you arrive, and fixing the handful of things that occasionally go wrong.

The instructions below apply to a standard QR-code style eSIM, which is how nearly all Taiwan eSIM plans are delivered. If you've already bought yours, keep the email or QR code handy and follow along. If you're still deciding which plan suits your trip, our guide to the best Taiwan eSIM for travelers breaks down data sizes and coverage first.

Before you buy: is your phone eSIM-compatible?

An eSIM is a digital SIM built into your phone, so the single most important check is whether your handset actually supports one. The good news is that almost every flagship phone from the last several years does, but it's worth confirming before you pay for anything.

Quick compatibility check

iPhone: iPhone XS, XR and every model since (including the SE 2nd generation onward) support eSIM. On the dial pad, type *#06# and look for an EID number — if one appears, your phone has an eSIM.
Android: Google Pixel 3 and newer, Samsung Galaxy S20 and newer (plus most recent Z Fold/Flip, Note 20 and A-series models), and many Motorola, Oppo and Huawei phones support eSIM. Check Settings → About phone or Settings → Network → SIMs for an "Add eSIM" option.
Carrier lock: Your phone must be carrier-unlocked. A device tied to a home carrier contract may refuse a foreign eSIM. If you bought your phone outright or it's out of contract, you're almost certainly fine.

One important caveat: some regional model variants do not include eSIM hardware even when the global version does. For example, certain phones sold in mainland China and Hong Kong ship without eSIM support. When in doubt, run the *#06# EID test or search your exact model number plus "eSIM" before buying.

What you'll need before you start

A Wi-Fi connection (home, hotel, or airport) — you install the eSIM over the internet, so do this before you need it.
The QR code or activation details from your purchase email.
A charged phone and about five minutes.

Installing the eSIM on iPhone

Apple has made eSIM installation very straightforward. There are two ways to do it: scanning the QR code, or pasting the details manually if you're reading the email on the same phone.

Method 1: Scan the QR code (easiest)

Open Settings → Mobile Service (called Cellular in the US, or Mobile Data in some regions).
Tap Add eSIM (or Add Data Plan).
Choose Use QR Code.
Point your camera at the QR code from your purchase email. If the code is on another screen or printout, hold the phone steady until it reads.
Tap Continue, then Add eSIM. The profile downloads in a few seconds.

Method 2: Enter details manually

If the QR code is on the very phone you're installing to, you can't scan it — so use manual entry instead. On the Add eSIM screen, tap Enter Details Manually and paste the SM-DP+ address and activation code from your email.

Label and set your preferences

After the eSIM installs, iOS asks how you want to use it. Choose sensible labels so you don't get confused mid-trip:

Label the plans: name your home line "Primary" and the new one "Taiwan Travel."
Default line: keep your home number as the default for calls and texts so you still receive 2FA messages.
Mobile data: set this to Taiwan Travel.
Data roaming: turn ON data roaming for the Taiwan eSIM line only — this is normal and required for a travel eSIM to work. It does not incur extra charges because the plan is prepaid.

A crucial tip: install now, but don't necessarily activate yet. Many Taiwan eSIMs start their validity countdown when the profile first connects to a Taiwan network, so you can install at home and simply leave the line toggled off until you land. Check your plan's specific activation policy in the email.

Installing the eSIM on Android (Pixel, Samsung, etc.)

The exact wording varies slightly by manufacturer and Android version, but the flow is the same: open settings, add a network, scan the QR code.

Google Pixel

Open Settings → Network & internet.
Tap the + next to SIMs (or tap "Add SIM").
When asked "Don't have a SIM card?", tap Download a SIM instead.
Tap Next and scan your QR code.
Follow the prompts to download and activate the profile.

Samsung Galaxy

Open Settings → Connections → SIM manager (older models: SIM card manager).
Tap Add eSIM.
Tap Scan QR code from service provider and scan it.
Confirm Add when the network is detected.

Set Samsung/Pixel data preferences

Once added, open your SIM or network settings and configure:

Turn the eSIM on (you can leave it off until arrival if your plan activates on first connection).
Set Mobile data to the Taiwan eSIM.
Enable Data roaming for that line — again, this is expected for a travel eSIM and won't trigger surprise fees on a prepaid plan.
Keep your home SIM as the default for calls and SMS so verification codes still reach you.

Activating data on arrival and APN settings

When you touch down in Taiwan, the final step is making sure your phone is actually using the new line. For most travelers this is automatic; for a few it needs a nudge.

On landing

Take your phone off Airplane mode.
Toggle the Taiwan eSIM line ON if you left it off.
Make sure data roaming is enabled for that line and that it's set as your mobile data source.
Wait a minute or two — the phone needs to register on a Taiwanese network (you'll typically see Chunghwa Telecom, Taiwan Mobile, or Far EasTone appear in the status bar).

Once connected you should see signal bars and a 4G/5G indicator. Open a map or browser to confirm data is flowing. If everything works — and it usually does — you're set for the trip. If you want to understand how reliable that connection will be beyond the cities, our overview of internet and WiFi in Taiwan covers coverage, dead zones, and public hotspots.

APN settings (only if data won't connect)

Most Taiwan travel eSIMs configure the APN automatically, so you should not need to touch this. But if you have signal yet no data loads, a manual APN can fix it. The APN value is provided in your activation email; common Taiwan carrier APNs include internet (Chunghwa Telecom) and twm (Taiwan Mobile). To set it:

iPhone: Settings → Mobile Service → your Taiwan line → Mobile Data Network → enter the APN.
Android: Settings → Network & internet → SIMs → your eSIM → Access Point Names → add or edit the APN.

Leave the username and password fields blank unless your provider specifies otherwise, then restart the phone.

Troubleshooting: no signal or no data

If something isn't working, don't panic and don't delete the eSIM — removing a profile usually means you can't reinstall the same one. Work through these fixes in order.

No signal at all

Restart your phone. This resolves the majority of registration issues and is the first thing to try.
Toggle Airplane mode on for ten seconds, then off, to force a fresh network search.
Manually select a network: in network settings, turn off automatic selection and pick Chunghwa, Taiwan Mobile, or FET by hand.
Confirm the line is enabled and that it isn't accidentally turned off in SIM settings.

Signal but no data

Check data roaming is ON for the Taiwan line — this is the single most common culprit.
Verify mobile data is set to the eSIM, not your dormant home SIM.
Enter the APN manually as described above.
Make sure the plan is active and not yet expired, and that you haven't used up your data allowance.

When to contact support

If you've restarted, confirmed roaming and the APN, and still have nothing after 15–20 minutes, contact your eSIM provider with your order number and a screenshot of your network settings. Because you'll likely be relying on hotel or airport Wi-Fi to reach them, it's another reason to install and test before you leave home. Travelers who like to have everything sorted in advance will find a connectivity step in our full Taiwan travel checklist handy.

A quick recap before you fly

That's the whole process: confirm your phone supports eSIM, scan the QR code over Wi-Fi at home, set your Taiwan line for data with roaming enabled, and switch it on when you land. Doing it before departure means no hunting for an airport SIM counter and no time offline in a new country. If you haven't picked a plan yet, compare data sizes and validity on our Taiwan eSIM plans page, and if you're still weighing your options against other methods, see how an eSIM stacks up against a physical SIM and pocket WiFi in Taiwan. Either way, a few minutes of setup now means you'll step off the plane already connected — ready for maps, translation, and bookings from your very first minute in Taiwan.

Frequently Asked Questions

When should I install my Taiwan eSIM — before or after arrival?

Install it before you fly, while you have Wi-Fi at home. The installation requires an internet connection, so it's far easier to set up in advance than to hunt for Wi-Fi at the airport. Many Taiwan eSIMs only start their validity countdown when the profile first connects to a local network, so you can safely install the profile early and simply leave the line switched off until you land. Always check your specific plan's activation policy in the purchase email.

Do I need to turn on data roaming for my Taiwan eSIM?

Yes. Turning on data roaming for the Taiwan eSIM line is normal and required for a travel eSIM to work, because the eSIM connects to a Taiwanese network rather than your home carrier. It will not cause surprise charges since the data plan is prepaid. Forgetting to enable roaming for the eSIM line is the single most common reason travelers have signal but no working data.

My phone shows a Taiwan network but no internet — how do I fix it?

First restart your phone, which resolves most issues. Then confirm three things: data roaming is enabled for the Taiwan eSIM line, mobile data is set to the eSIM (not your home SIM), and the plan is active with data remaining. If it still won't connect, enter the APN manually using the value in your activation email — common Taiwan APNs include 'internet' for Chunghwa Telecom and 'twm' for Taiwan Mobile — then restart again.

How do I know if my phone supports an eSIM for Taiwan?

On most phones you can dial *#06# and look for an EID number; if one appears, your phone has eSIM hardware. iPhone XS/XR and newer all support eSIM, as do Google Pixel 3 and newer and Samsung Galaxy S20 and newer. Your phone must also be carrier-unlocked. Note that some regional variants sold in mainland China and Hong Kong ship without eSIM support, so check your exact model if unsure.

Can I keep my home phone number active while using a Taiwan eSIM?

Yes. eSIM-capable phones support dual SIM, so you can keep your home SIM active for calls and texts while using the Taiwan eSIM for data. Set your home line as the default for calls and SMS so you still receive verification codes and 2FA messages, and set mobile data to the Taiwan eSIM. Just keep your home line's own data roaming switched off to avoid charges from your home carrier.