The €7.99 plan includes EU roaming support.
100GB €7.99 Plan
This 100GB plan is only available to new 48 customers who activate their 48 SIM (by inputting activation code found on your sim packaging via the link https://48.ie/activate-sim) and purchase a 100GB plan before 1st February 2021 (Offer Period). If your first 100GB plan purchase is during the Offer Period, you can continue to purchase this 100GB plan until such time as you leave the 48 service. However, if you switch to another 48 plan (except for the 100GB €10.99) you will not be permitted to switch back to the 100GB €7.99 plan.
100GB of ROI data of which you may use a maximum of 10GB in EU/UK, subject to you having data allowance available when you travel. For example, if you use 96GB data in Ireland you will have a combined balance of 4GB remaining. Your EU/UK roaming allowance is now also effectively 4GB.
Minutes made to landlines including non-geographic numbers and mobiles within the Republic of Ireland and calls made while roaming in EU to other EU numbers and back to Republic of Ireland are subject to a limit of 5,000 minutes per monthly plan.
Texts to Irish mobile numbers and Irish landline numbers while in the Republic of Ireland and texts made while roaming in EU to other EU numbers and back to Republic of Ireland are subject to a limit of 5,000 texts per monthly plan.
If you need to contact 48 support about this then see the links in my signature below.
