UPDATE: I just used my friend's SIM Card to test Dell Voice. My friend has a data plan with ROGERS, and we use the same phone. I put his SIM in my phone, downloaded DV again, and restarted, but it is still giving me the same error messages.
It's been a couple of days since the BlackBerry app has been released, and I still am not able to get it working over my Wi-Fi connection. As I am on prepaid, and I have no data plan, I receive error messages.

"Detected Carrier: TELUS (220)
Please select your Carrier"

"Error downloading configuration. Exiting client."
It briefly pops up "a network connection is required to use this feature."
I am connected to a fully functional Wi-Fi hotspot, but I do not have a data plan. If I recall correctly, Dell Voice for iPod touch can use Wi-Fi.
I have tried the suggestions. Please do some testing with no SIM and just wi-fi, and get back to me. Thank you.