JamboSim eSIM Data Plans for Guam

JamboSim does not provide a truly unlimited data eSIM for Guam. The plans that carry the word “Unlimited” in their names actually allow 3GB of high‑speed data per day and, once that daily quota is reached, the speed is throttled to 1000 kbps.

Users looking for a larger or fixed data allowance can choose from JamboSim’s regular plans, such as the 30‑day plan that offers 3GB per day for $69.99 USD, or the even larger 20GB plan valid for 30 days and available in Guam and over 117 other countries at $83.99 USD. These fixed‑data options are often more cost effective for travelers who require more data without the speed reduction after a daily limit.

JamboSim does not provide a Guam eSIM that includes a phone number or SMS capability. The only eSIM options for Guam from JamboSim are data‑only plans. Travelers who need voice or messaging may use VoIP services such as WhatsApp, Telegram, or iMessage over the data connection, but those apps may be blocked or limited in Guam, so it is advisable to check their availability before purchasing.

JamboSim offers 5 single‑country data plans and 9 multi‑country data plans that include Guam. The single‑country options provide a fixed data amount ranging from 1 GB to 10 GB with a validity period of 1 to 30 days, while the multi‑country plans are fixed‑data plans presenting data caps from 5 GB up to 20 GB and validity ranges extending from 7 days to 365 days. Prices for both types of plans span from roughly $7 for the lowest‑priced single‑country offering to nearly $94 for the most comprehensive multi‑country option.