I have my BB 9300 since a few days ago and I am very happy with it even when there are a few things I can not do.
One of these are that I can not see my locations in the maps using only the network cell. GPS is working fine.
I have seen the configuration on locations and it seams to be fine. With may previous mobile and same sim I was able to do it so I am discarding it is something related with the network.