Thank you for coming back to me. We have two different types of activation, one is Pre-Activation which will activate the new SIM card as soon as it's dispatched from our warehouse, and the other one which is Self Activation, which is what your new SIM card seems to be.
After a certain amount of time, the new SIM card will automatically deactivate if it has not been activated and a new one will need to be ordered so that you're migrated over to the Vodafone network.
In regards to this, as our contract with EE is ending and we are sending out SIM cards for customers to migrate over to Vodafone, this can mean that your current SIM card can cease to work at anytime in the next few days or months.
Can you tell us how long you'll be out of the UK for?