Dolphin on Orange does include data but obviously your service has not been set up properly
Options icon - Advanced Options - Host Routing Table
Press the Menu key and select Register Now
If that doesn't work skip the website and call them for help
Im having problems with the "BlackBerry Curve 8520"?
You need to use your provider's mobile network to use apps
To use the mobile network you need to have a wireless data plan
If you want to use AppWorld and applications you have to add data to your wireless plan
Wi-fi does not mean that you can use the internet anywhere. In order to use wi-fi there must be a wi-fi signal available and apps will not work using wi-fi without a data plan
The issue here is that you need to get a data plan separate from a phone plan.
A data plan (BIS Blackberry Internet Service) is needed to connect to the Internet so that you may download/surf/chat or what not.
Now if you have WiFi, you may be able to connect for free to a place that offers wireless connections. Such as a cafe, hotels, home wireless, schools.
You dont need any passwords to use the blackberry messenger you just need to make sure the latest version is downloaded onto your handset. You may need to create a username and password for the messenger service but you do that yourself not from O2.
I work for O2, hope that helps.