I have a Blackberry Curve 8520. I am with T-Mobile UK, I have the SIM only plan with unlimited internet. Blackberry app world, Ubertwitter, The Weather Channel all work and so does the browser. But the standard Twitter app says 'Twitter Services Are Currently Unavailable'. I have looked all over the internet and no one seems to have a sensible answer. Why do my other apps work and not Twitter. I also noticed it is the saame for the Facebook app. Please help...