eSIM Saily pour Guam en 2026

The broad catalogue makes data sizing the main decision: the risk is buying more than a fortnight needs. Saily has not published which operators it uses in Guam, so the radio side is unknown rather than bad; the table above is where the available allowances and validity can be checked. It has also not stated where traffic breaks out or the fastest technology it lists, so local delay, apparent IP location and the technology ceiling are unknown. Saily does not say whether top-up is available, which matters when data runs out.