Exactly that - it's a one time activation charge that applies when you buy your first membership plan.
€12.99 Plan
This €12.99 Plan is only available to new 48 customers who order their 48 SIM and purchase a €12.99 Plan from the 5th April 2022. A one-time activation fee of €12.99 applies with the first plan purchase.
If you need to contact 48 support about this then see the links in my signature below.
