hi DMX,
the link you posted is for a BB7290 Dual Sim Card. Within the same site, I also found a dual sim card for BB8700:
Link here: Blackberry 8700c Ghost Dual SIM
Are you saying that even their instruction says you have to reboot your phone each time, in reality, you don't need to restart? Did you eventually buy from the link you posted (Ghost Dual Sim), or from some other company?
I have ordered the Ghost Dual SIM for 8700c, and would greatly appreciate it if you could share some more details such as the installing steps you did.
This will be so useful when we travel abroad. No more worries that we may lost the other SIM card.
Thanks!