Blackberry curve service plans for UK ?

I live abroad but when i come back in the summer for 2 months i want you use bbm and internet and stuff, can i get it for like 2 months instead of buying the phone plan for about a year! I have a vodafone sim card but i dont mind switching services...? and in the UK its scotland and i have the blackberrry curve 9300 3G one. How much will it cost, THANKSSSS :D XXX