In order to use 5G services, you need 3 pre-requisites.
1: To be in a 5G coverage area, 2: To be using a 5G-compatible phone, 3: To be on a 5G plan.
You have covered point 3. Which phone do you have, to cover point 2.
You can check point 1 using "check coverage" on https://coverage.ee.co.uk/coverage/ee
