Thailand eSIM Glossary: Terms on Plan Pages Explained

The words on eSIM plan pages decide what you get for your money. Here they are in plain language, with the Thailand details that matter.

A SIM profile stored on a chip inside the phone. It is installed by QR code or app instead of inserting a plastic card.

A data plan for use abroad, usually without a local phone number. All the providers on our board sell data-only Thailand plans.

How many days a plan can be used once it starts, for example 30 days or 180 days.

How long you can wait between buying and first use. TonMobile allows 180 days; Ubigi allows six months.

Ubigi's name for starting a plan's validity when you arrive in the destination country.

A plan priced by days with no total data cap, usually with a daily full-speed allowance before speeds drop.

Full-speed data per day on an unlimited pass. TonMobile lists 1 GB a day, then 512 kbps; Saily lists 5 GB a day, then up to 1 Mbps.

A rule that lets a carrier slow speeds after heavy use. Holafly and the Thai tourist SIMs mention one.

Sharing the phone's data with a laptop or tablet. Holafly caps it at 500 MB a day; Saily lists it as unrestricted.

The setting that lets a foreign line use a local network. It must be on for a travel eSIM line in Thailand.

A restriction that ties a phone to one carrier. On iPhone, "No SIM restrictions" in About means the phone is unlocked.

The unique identifier of the eSIM chip in a phone, shown in the device information screen.

Adding data to an installed eSIM without a new profile. TonMobile and Ubigi support top-ups in their apps.

Thailand's three main mobile networks, measured by Opensignal in its August 2026 report.

A physical prepaid SIM for visitors, sold at airport kiosks and shops and registered to your passport.

The Thailand Digital Arrival Card, required for foreign visitors since May 1, 2025, submitted free within 72 hours before arrival.

See the terms in use on the Thailand eSIM guide and the provider board.