Best eSIM for Taiwan: What "Unlimited" Actually Means, and When the Airport SIM Wins
The best-value option in Taiwan isn’t a travel eSIM at all — it’s a genuine Chunghwa unlimited SIM, about NT$300 for 5 days or NT$500 for 7-10 days, with a real Taiwanese phone number included. Get it at the airport counter (before 9:30pm, cash only) or pre-buy the eSIM version through Klook or KKday. Travel eSIMs like Airalo and Saily win on convenience for short trips and late-night landings — just know that almost every “unlimited” plan secretly throttles.
Taiwan connectivity is cheap and excellent, which makes it funny how easy it is to overpay for it. The market splits into two camps, and picking the right camp matters more than picking the right brand.
Camp 1: a real Taiwanese carrier SIM (the value play)
Chunghwa Telecom, Taiwan Mobile and FarEasTone all sell tourist SIMs with genuinely unlimited data — no daily cap, no speed cliff. Chunghwa’s pricing sets the bar:
| Days | Price | Per day |
|---|---|---|
| 3 | NT$300 (~US$9) | ~US$3 |
| 5 | NT$300 (~US$9) | ~US$1.90 |
| 7 | NT$500 (~US$16) | ~US$2.20 |
| 10 | NT$500 (~US$16) | ~US$1.60 |
| 30 | NT$1,000 (~US$31) | ~US$1 |
(Yes, 5 days costs the same as 3. No, nobody knows why. Buy the 5.)
Every plan includes some call credit and — this is the part that matters — a real +886 phone number. Taiwanese booking systems, banks and LINE Taxi send verification codes to Taiwanese numbers only. If you’ll book restaurants, use local ride apps beyond Uber, or need any SMS code from a Taiwanese service, the carrier SIM quietly saves your trip. Nearly every travel eSIM is data-only.
Two ways to get one:
- The airport counter. All three carriers have desks in both arrival halls at Taoyuan. Passport required, cash only (exchange or withdraw first), and they close around 9:30pm — the classic red-eye trap. eSIM and physical SIM cost the same.
- Pre-buy online through Klook or KKday. Both sell genuine Chunghwa eSIMs you install before flying. Chunghwa’s own online reservation system is suspended, so the resellers are the legit online route, and prices track the counter closely. (Check current prices in the app — they move around.)
Which carrier? Chunghwa. It swept all four network-speed awards in the most recent Opensignal report and has the strongest coverage in the mountains and down the east coast — exactly where a Taiwan trip goes when it gets good. Taiwan Mobile and FarEasTone are perfectly fine on the main tourist circuit.
Camp 2: travel eSIMs (the convenience play)
Install before you fly, land connected, no counter, no cash. For a short trip or a midnight arrival this is genuinely the better experience. Current lineup:
| Provider | Sample pricing | Network | The catch |
|---|---|---|---|
| Airalo | 5GB/30d ~US$12; unlimited 7d ~US$29.50 | Taiwan Mobile | Data-only; unlimited tier is new but pricey |
| Saily | 5GB/30d ~US$12; “unlimited” 15d ~US$49 | Multi-network | Unlimited = 5GB/day fast, then 1 Mbps |
| Holafly | Unlimited only, 5d ~US$20.50 | Chunghwa (mostly) | Speed-capped around 18 Mbps; hotspot ~1GB/day |
| Klook eSIM | From ~US$0.89/day; unlimited option | Chunghwa 5G | Unlimited = 15GB/day full speed, then 1 Mbps; hotspot allowed |
| Jetpac | 10GB/30d ~US$15 | Taiwan Mobile | Unlimited = 3GB/day, then 1 Mbps |
| Nomad | 10GB ~US$16 | Says Chunghwa | Testing has shown it riding a Hong Kong roaming profile — works, but ~200ms latency |
The pattern to notice: “unlimited” almost never means unlimited. It means “a daily allowance of fast data, then a crawl” — 1 Mbps is enough for maps and messages, not for uploading your night market videos. The genuinely uncapped plans in Taiwan are the carrier ones from Camp 1. To be fair, some daily caps are generous (Klook’s 15GB/day is more than most people use in three days) and some are tight (Jetpac’s 3GB/day) — the point is to read the fine print and pay accordingly.
One more trap, checked July 2026: the cheapest eSIMs on reseller marketplaces (the “no KYC, from $0.50/day” listings on KKday and similar) are often Hong Kong roaming profiles — a HK carrier’s SIM roaming onto Chunghwa’s towers. They work, but expect higher latency, no hotspot on some products, and support from the reseller rather than the carrier. The genuine carrier products on those same marketplaces are separate listings (KKday’s Chunghwa foreigner eSIM, and a FarEasTone unlimited that includes a real Taiwan number, often on a buy-one-get-one deal) — worth the few extra dollars.
Per-GB plans are the smarter travel-eSIM buy: Airalo and Saily both sell 5GB for around US$12, and light users (maps, LINE, some photos) get through a week on that.
Doing Taiwan + Japan + Korea in one trip?
Regional eSIMs cover all three — Airalo’s Asialink (5GB ~US$15, 10GB ~US$25) and Saily’s Asia plans are the usual picks, and one eSIM beats juggling three. Tradeoffs: they’re per-GB (regional unlimited is rare), and they ride roaming profiles, so expect a bit more latency than a local SIM. For a Taiwan-heavy trip with short hops, consider a proper Taiwan SIM plus a small regional plan for the other legs.
Setup gotchas (read before you fly)
- Install the eSIM on hotel or home WiFi before departure. Most plans don’t start their clock until first connection in Taiwan, and you don’t want to be the person doing QR-code yoga on airport WiFi.
- Your phone must be carrier-unlocked, and eSIM-capable (iPhone XR or newer; most recent Androids — check your exact model).
- 3G is gone. Taiwan shut its last 3G network at the end of 2025, so calls on a carrier SIM need a VoLTE-capable phone. Anything from the last several years is fine.
- Tethering: carrier unlimited SIMs hotspot freely on 4G plans. Travel eSIM “unlimiteds” often cap the hotspot separately (Holafly: about 1GB/day).
FAQ
Is Airalo reliable in Taiwan?
Yes — it rides Taiwan Mobile, which is solid in cities and along the main tourist routes. In the high mountains and on the east coast, Chunghwa-based options have the edge. Just buy per-GB rather than Airalo’s unlimited tier, which costs more than a real carrier unlimited SIM.
Can I get a Taiwan eSIM with a real phone number?
The carrier eSIMs can — Chunghwa tourist plans (counter or via Klook/KKday) include a +886 number and call credit. Standard travel eSIMs (Airalo, Saily, Holafly, Nomad) are data-only. If you need SMS verification codes from Taiwanese services, that number is the whole ballgame.
Should I buy a SIM at the airport or an eSIM before I fly?
Landing during the day and staying a week or more: the counter (or a pre-bought Chunghwa eSIM) wins on price and gives you a number. Landing after 9:30pm, staying under a week, or hate counters: load a travel eSIM before you fly and walk straight out.
Are the “unlimited” eSIMs really unlimited?
The carrier ones, yes. The travel eSIM ones throttle after a daily allowance — Jetpac at 3GB/day, Saily at 5GB/day, Klook at a generous 15GB/day — and Holafly caps speeds around 18 Mbps throughout. Read the fair-use line before paying unlimited prices; a big daily cap is fine for almost everyone, a small one isn’t.
Which option is best for Taroko, Alishan and the east coast?
Anything riding Chunghwa — the carrier’s own SIM, or Chunghwa-based eSIMs via Klook/KKday. It’s the network that keeps bars up in the mountains. Expect dead zones on remote trails on every carrier.
Prices, schedules and closures change. Every page shows when it was last verified — if you spot something stale, email us.