I tried to re-activate the SIM card and spoke to a CSR who told me the activation transaction was pending at the switch (for lack of a better explanation its the computer that controls service).
Anyway, she transferred me to a switch tech who performed some trouble shooting. When we exhausted a couple (remove SIM, reset etc), he double checked my SIM. Turns out the SIM card I was given with the 4510L did not match the serivice order. He updated the SIM number on his end and in a few seconds I had Internet connectivity.
Probably not much help to anyone else as this does not happen frequently but a reminder to just double check that the activation of the device went through.
I have the MiFi as well. 3 G only service.
I have had nothing but trouble with this unit and the previous Samsung Hotspot.
Looks like it working but no connection.
Signal can be full but no connection.
I have had to do many hard resets w/paper clip for 20 sec. Most times it will work after that.
The most anoying problem is the signal dropping from full to 1 or 2 bars w/out moving the device.
Talked to teck support many times. Put in service ticket on local tower.
Its been months with no progress.