it will work only - when you have topped up your account or bought a plan equivalent to £10 or more. , right?
You will need to call your current provider and request a PAC (port authorisation code). Once you have received your PAC code, call us on 669 from your Now mobile (or 0330 993 7339 from any other network/landline provider), and let us know that you want to keep your existing number.
You will need to give us your PAC code so make sure you have it with you.
It usually takes up to 2 working days to move your number. We will send you a text to let you know when the process is completed.