G'day and thanks Effendi - I certainly don't expect you to be available all the time

So you are saying that I do not have to sign a contract? Forgive me, but in Canada and Australia you have to sign a contact for at least 12 months usually, so I just want to be sure I understand correctly and plan accordingly as I only need the service for the month of July while I am travelling.
I've decided to go to Prague and Vienna as well, so I suppose I will need to get SIM cards there too.
cheers,
lal