Page 1 of SL55 reset help

Hello everybody, I hope someone can help. I`ve tried google-search but it didn`t get me anywhere......
I want to reset my SL55 to clear the T9 dictionary and other bits I think I might have messed up while playing with the phone (don`t ask!). I don`t need to unlock the phone (don`t even know if it is locked, got from O2 but no O2 logos on box). Can I do this? Do I need a data cable for this? I`m going to the states in a couple of days - would it pay to get a data cable there?

Thanks everybody

katiekins
(because it makes me sound nice and cute)