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Quick Answer
| Provider | Real +66 Number? | SMS? | Voice Calls? | From |
|---|---|---|---|---|
| Yesim | ✅ Yes (voice plan) | ✅ | ✅ | $1.68/day |
| Thai carrier eSIM (AIS/True/dtac via thailandesim.com) | ✅ Yes | ✅ | ✅ (KYC needed for outgoing) | $8.90 |
| Airalo | ❌ No | ❌ | ❌ | $6 |
| Saily | ❌ (US number add-on only) | ❌ Thai | ❌ | See live pricing |
| Drimsim | ❌ No | ❌ | ❌ | €10 + top-up |
Why a +66 Number Matters in Thailand
- Grab: Registration and login require a phone number — drivers also call you
- Bank OTPs: Thai banks and some international cards send SMS codes
- Food delivery: GrabFood/LINE MAN riders call when they arrive
- Hotels & tours: Local operators call to confirm bookings
A data-only eSIM handles maps, messaging apps, and browsing perfectly — but the moment something needs SMS verification, you're stuck.
The Options in Detail
Yesim — Simplest +66 Number on an eSIM
Unlimited data from $1.68/day or pay-as-you-go credit; add a voice plan and you get a real Thai number with SMS and calls on AIS/DTAC networks. 100% refund guarantee. No passport upload, no store visit. Check Yesim's voice plans →
Thai Carrier eSIMs (AIS / True / dtac)
The real thing: genuine carrier eSIMs with a Thai number, sold online with email delivery — dtac and True plans from $8.90 on thailandesim.com. Two caveats worth knowing: True eSIMs can only be installed once you're in Thailand, and making outgoing calls/texts requires bringing your passport to a carrier store for KYC verification. Incoming calls and SMS work without that step.
⚠️ Traps to Avoid
- aloSIM's "free phone number" is a US/Canadian number — useless for Thai OTPs and local calls
- Saily's number add-on is a US number — same problem, won't help with Thai services
- "SMS-receive-only" numbers — some plans receive texts but can't call out; check voice terms before buying
Prices last checked October 2026. Verify at checkout.