I have been really trying to find a stable reliable SIP app for Blackberries in general and have had no luck. Just spent six weeks testing out the Vippie app from Voipswitch and it was next to useless. In the end they blamed RIM for not having a stable platform, I imagine, not.
Trying to use the FGmicrotec version now and not much positive I can say about that either.
It is critical for me to locate a solution that works for real, is simple to use, syncs with contacts, prefers Wi-Fi when available but will utilize your cell carrier's data plan via your Voip number if Wi-Fi isn't.
It seems that developers/suppliers of these apps are more interested in sales than if their apps actually work or not. They sure have their marketing down pat, too bad the products don't match the effort put into marketing.
