jadf24 wroteI have a BB and it seems whatspp only works on wifi
Plus whatsapp is just a trial so sooner or later you'll have to start paying
Though there's another app its called Cnectd that works on the same principle but in addition you can use it on whichever connection settings suits you best (wether BIS, BES, TCP/IP , wifi , but I'm still not sure about wap)
And the good thing is that it's totally free
What's app does work on Blackberry, you've got to have the service.
As for the trial, you uninstall the application then install it again.