Hello
I received a Blackberry 8700c, last week, I unlocked it
now it will not reconize any sim card. Is there something
that needs to be done, besides the unlock?
thanks
Best
Dave

what error you are recieving ?
"Invalid Sim card"....................?

if yes then the BB is still locked to service provider, else contact the vendor

Is this a new 8700 or did you get it used?

Is there an IT Policy?

Does it accept an ATT SIM?

Sounds like either it isn't really unlocked, the SIM is bad or there is a problem with the device.