Ooh, does your husband work at the James Henderson? We were just talking about it the other day as musing where to send my DD next year. Alas it's far too expensive so that idea's been binned atm. What does he teach?
Agree with Franca, take the phone back to the shop and get them to do it. I'm afraid I have no experience of Tim so wouldn't be able to guide you, I found it's the most expensive of the mobile companies so have always steered clear.