As Chris has mentioned, this is just a change of payment plan and there is consequently no need to replace your SIM unless there is a problem with the one you already have.
I would only add, that if you request this change of payment plan by phone with EE C/S, the change is often immediate and completed while you're on the line. If you do the request online via myEE, then it's under the "upgrade now" section.
@Natm You just need to upgrade. Your account will change to the new tariff around 24 hours after upgrading and you don’t need a new sim as it’s only an account change. You might be sent a sim to your billing address but you don’t need it.
To contact EE Customer Services dial 150 From your EE mobile or 0800 956 6000 from any other phone.
As Chris has mentioned, this is just a change of payment plan and there is consequently no need to replace your SIM unless there is a problem with the one you already have.
I would only add, that if you request this change of payment plan by phone with EE C/S, the change is often immediate and completed while you're on the line. If you do the request online via myEE, then it's under the "upgrade now" section.
