Hi there everyone, im new here, and have just purchased an iphone which has already been unlocked.

However i was just wondering which iTunes version i should use? I am currently using

I do not want to block the sim networks i am currently using in the UK.

And in the version i do not have a ringtone tab when i click on my iphone. Thats the only reason i ask weather or not to upgrade to a version higher than the current one?

Any help from anyone would be greatful...