A newly activated Verizon SIM with a static APN (e.g. ne01.vzwstatic) is inserted into a 63xx-series device on 18.4.54.22 device firmware using the CM04.  The 63xx-series cellular extender is able to detect the SIM and seeing an available Verizon network, but the 63xx-series device is unable to establish a cellular connection.  The LED behavior on the front of the 63xx-series device will be a flashing white status/LTE LED, and intermittent 5 bars of signal strength.

It can sometimes take longer than the 63xx-series device anticipates for the Verizon SIM to finish its registration process on the Verizon network.  As a result, the 63xx-seris device tries establishing a cellular connection before this SIM finishes registering, which results in a failed connection.  The 63xx-series device interprets this failed connection as it not using the correct APN, so it resorts to its fallback list of APNs to try alternate Verizon APNs with the SIM.  Since the correct APN was already tried, this fallback list of APNs will try APNs that are not provisioned with the SIM.  The result is the 63xx-series device gets stuck trying a fallback list of APNs, of which none will work with the given SIM.

Users can lock the 63xx-series device to keep trying the same APN.  This allows the 63xx-series device to retry the same APN that the SIM card is provisioned with.  Even if the 63xx-series device cannot establish a cellular connection with the SIM initially, it will keep trying with the same APN until it connects.

To implement this manual solution, update the configuration profile of the Accelerated 63xx-series device with the following configuration changes:

1. In Modem -> APN, set the appropriate static APN (e.g. ne01.vzwstatic).
2. Enable the Modem -> APN lock checkbox.