JamboSim eSIM Data Plans for United Kingdom

JamboSim does not provide a true unlimited data eSIM for the United Kingdom. Every plan listed for the UK offers 3GB of high‑speed data per day; after that limit the speed is throttled to about 1 Mbps. The term “Unlimited” in the plan names refers only to the absence of a hard cap on the total data that can be used, not to unlimited high‑speed data.

If a larger data allowance is needed, JamboSim offers fixed data plans such as the 100GB plan valid for 180 days or the 50GB plan valid for 30 days. These plans give a higher total data amount and can be more cost‑effective for travelers who expect to use more data than the 3GB/day limit.

Yes, JamboSim sells several eSIM plans that include a phone number and the ability to send SMS while traveling in the United Kingdom. These plans use the United Kingdom dialing code +44, provide outbound voice calls and outbound SMS, and are available in a range of sizes from 1GB to 50GB and validity periods from 3 days up to 30 days.

The cheapest UK‑only plan is $2.99 USD for 1GB with a 3‑day validity, while the largest UK‑only plan is $31.99 USD for 50GB with a 30‑day validity. All of these plans offer a UK local number, outbound voice and outbound SMS capability. If you need a specific function such as inbound calls or SMS, it is advisable to verify the exact features directly with JamboSim.

JamboSim offers 25 single‑country data plans that cover the United Kingdom and 57 multi‑country plans that include the UK as part of a broader destination list. The plans range in price from about $1.99 to $195.99 and provide data volumes between 200 MB and 100 GB over validity periods from 3 to 365 days. While most plans are fixed‑data‑cap packages that allow a set amount of data for the entire validity period, a smaller subset offers daily data caps that reset every 24 hours. Many of the plans permit tethering, though data speed may be reduced to 1000 kbit/s after the cap is reached.