Yesim offers several unlimited data eSIM plans that work in Costa Rica. The plans start at 1 day for $11.63 USD and extend to 7 days for $33.74 USD, 15 days for $58.17 USD, and 30 days for $83.77 USD. Each plan permits tethering and is labeled as unlimited, but the network type is 3G, LTE, and the plan description notes that speed may be throttled after heavy use.
The operator applies a Fair Usage Policy, which means that although the data allowance is unlimited, speeds can be reduced once a user has consumed a large amount of data within the validity period. Users who want to make sure that their speeds will remain consistent should contact Yesim directly to confirm how the policy is applied and what typical data bandwidth is maintained at normal speed.