Thailand 5G eSIM with Unlimited Data (AIS)

What it is

The Thailand 5G eSIM with Unlimited Data runs on AIS, Thailand's largest mobile network with coverage reaching over 98% of the country on 4G/LTE and a rapidly expanding 5G footprint across Bangkok, Chiang Mai, Phuket, Pattaya, Koh Samui, and other major tourist destinations. It's a digital SIM — no plastic card, no airport counter queue, no passport hand-off on the spot. You receive a QR code, scan it with your phone, and the eSIM profile installs in about 30 seconds over Wi-Fi. Plans typically come in multiple validity windows (commonly 7, 10, 15, or 30 days) and are marketed as unlimited data: you get a set amount of high-speed data (the exact GB cap varies by plan and retailer), after which speeds throttle to around 384 Kbps for the rest of your validity period — enough for maps and messaging, but not streaming. Tethering and mobile hotspot are generally supported, letting you share the connection with a laptop or travel companion.

Highlights

• AIS network — Thailand's largest operator, with 4G/LTE covering 98%+ of the population and 5G active in Bangkok, Chiang Mai, Phuket, Pattaya, and major resort areas
• Unlimited data plan: full high-speed (5G/4G) up to your plan's data cap, then throttled to ~384 Kbps — you stay connected but heavy streaming slows down
• Instant QR code delivery — scan to install the eSIM profile in ~30 seconds; no physical SIM slot needed, no airport counter required
• Multiple validity options typically available (commonly 7, 10, 15, or 30 days) — choose the duration that matches your trip length
• Tethering and mobile hotspot supported on most plans — share your connection with a laptop or travel companion
• eSIM-compatible smartphone required — works with iPhone XR and later, Samsung Galaxy S20 and later, Google Pixel 3 and later, and most modern flagship Android devices

Good to know

• Your phone must support eSIM — check your device settings or manufacturer specs before purchasing; physical SIM-only phones are not compatible
• Install and activate over Wi-Fi before you land for the smoothest experience; most plans allow activation after arrival too, but having it ready saves hassle at the airport
• Activation timing varies by plan — some plans start the validity clock the moment you activate, not when you first use data, so plan accordingly
• Thai regulations generally require passport registration for SIM cards; if purchased through official AIS channels or airport stores, registration is handled on-site — third-party eSIM resellers may handle this differently, so check at purchase
• High-speed data caps and throttle thresholds vary by plan and retailer — always confirm the exact GB cap before buying; '384 Kbps after cap' is typical but not universal
• If you need to use two numbers simultaneously (e.g., keep your home number active for calls), most modern phones support dual SIM + eSIM — your home physical SIM can stay in while the AIS eSIM handles data