Jmatero said: If your MicroCell EVER worked... you can disconnect, change addresses, etc. If it has YET TO WORK... you CAN'T use disconnect.

Again, not true.  I have registered and disconnected my device a dozen times with different addresses, and it has NEVER WORKED, because the device is not located at the address to which I registered it.  Now, if you have never gotten your device registered, of course you can't disconnect it.  Disconnect won't even be an option for you.