Which carriers matter, what buying a SIM involves, and when an eSIM is the smarter move.
Reliable mobile internet at better prices than most travel eSIMs, with polished iOS and Android apps and support for making and receiving phone calls.
One of the biggest travel eSIM brands, with a very large destination catalog.
Known for unlimited-data plans in many destinations, at a higher price per gigabyte.
Avoid pre-activated SIMs sold without an ID check; they can be blocked without warning.
Best choice for broad coverage, including rural areas.
Tourist-friendly choice with a straightforward purchase process.
A solid alternative; compare current prepaid offers before buying.
Bring your passport; the seller registers the prepaid SIM during activation.
Guac eSIM covers Vietnam with data plans starting from $1.50 per GB and instant activation, so your phone is online the moment you land. Airalo and Holafly are popular alternatives.
SIM cards and eSIM in Vietnam