I had the same problem. I removed my vodafone sim from my blackberry as it didn't have blackberry services; I replaced the sim with an orange sim, newly topped up with £15. I bought packages, unlimited texts, data and blackberry services. It was appauling as it took at least 4 phone calls to orange each day until it activated. Once it did, my bbm 6 wouldn't work. This could have been due to the fact it hadn't quite connected yet, but I upgraded anyway to bbm 7. Launched the application, typed in my details and BlackBerry ID. I waited 24 hours, it was still associating with my BBM pin. I then phoned orange on about the sixth day and raged at them. It turned out that because I hadn't had blackberry services before on this device, or at least for a long time, I had to do a soft reset. So, if you suffered from this bbm 7 problem, pull your battery out for NO LESS than 30 seconds. After that, mine worked fine, I could access browsers, my bundles worked and so did my bbm and email.
If yours continues to fail, try again until you have the UMA and blackberry logo on the top right of your screen.
If still no sign, contact orange and do what I did. Then, claim your credit back for the calls as you were 'complaining', worked for me! They fixed it all in less than 5 minutes, brilliant.
Hope this helped x x x
Do you know that I've been dealing with RIM since Tuesday morning. They told me I couldn't Down Grade to BBM Version 6. I've gone up three levels of support and they still haven't helped me. But because of you it now works. 
