I joined ID mobile on 08/06/2023 on a sim only deal. If i am not mistaken this would allow me to use my full allowance in the 50 EU countries. If i was to stay on ID mobile and upgrade through their own store to a phone and sim deal will this benefit stay with me.
https://www.idmobile.co.uk/help-and-advice/eu-roaming/fair-usage-policy#before-june-2023