App Error 523, BBM 5.0 problems, slow deleting videos and App World freezing

I have 4 rather irritating problems with my Curve.

the first is I often recieve a app error 523 reset message. What can I do to sort this out short of relaoding all the OS.

Second is that it takes about an hour to delete one video, and it freezes the whole phone while this is being done. What can I do aboutt his?

Thirdly, I have App World on my phone and it just continues to freeze everything. I have to hard reset my phone in order to use it again, which given it takes 10minutes to switch on, and a further 2minutes for all the call logs etc to be updated, this is extremely infuritating.

FInally, my BBM 5.0 often comes up with no contacts, or refuses to send a message, does not display a new BBM or just freezes as well.

Are all of these problems interlinked? Is it my service provider (o2)? ANy advice or answers would be very useful and much appreciated.

You have so many problems but the one solution I could provide was already dropped on your second sentence...

I'd be a lil extreme here, faced with all the issues you have. I'd get the latest official OS and install it without any backup/restore options on. Back to factory defaults.

It feels like either you have serious OS issues or a defective device. I'd bet on the 1st.