Verizon has a two-step approval process. First the manufacturer has to get the device approved. Then the vendor of the end-device has to get all the IMEI white-listed. If you bought your ep06 from Gl-Inet the second step has not happened. Verizon started to kick such devices off the network over the past months. The only thing you can do is to change the IMEI or get a fully-approved modem. Or to switch to a network that doesn’t have such stupid rules/hurdles.