Back to the subject of jail breaking the IPhone....
I jail-broke my IPhone twice using Blackra1n(?) and then rebooted the phone as per the instructions on a particular website. I then added Cydia to the IPhone. But as my phone was still connected to my PC, Itunes immediately opened and detected that the IPhone was Jail-broken and immediately demanded a reset. Obviously, the Itunes program is able to detect the fact that the IPhone has been jail broken...
So I had no choice but to reset, otherwise I could not use the phone....
Obviously you can't use Itunes on Jail-broken IPhone! Is that right?
In the end, I just thought it was too much trouble, as Cydia only has good apps for customising the IPhone. But MXTube and YourTube have sparked some interest. Are they only available on Cydia?
And once your IPhone is jail broken, can you still use ITunes if there is an app you like?