Roamless lists four single‑country plans for Monaco that are not pay‑as‑you‑go. There are no multi‑country plans available for this destination. In addition, the provider offers a set of pay‑as‑you‑go data credits, available in 15 different top‑up sizes, that are sold separately from the fixed‑data plans.
The fixed plans vary roughly from a few hundred dollars to about $328, with data amounts ranging from 100 MB up to around 30 GB. The pay‑as‑you‑go credits have price and data equivalents that span a similar range; the credit can be drawn down as data is actually used and does not expire, so unused balance can be carried over to future trips. Tethering is allowed on some of these plans, and the pay‑as‑you‑go offers are only available to new users.