Resideo Discovers Issue With Small Number of Verizon SIMS

Resideo has been investigating an issue with a very small number of communicators. The LTE-CFV, HWF2V-COM, LTE-IV, LTE-L3V, and VISTA-21IPLTE with LTE-21V. In a few cases, starting on March 19, 2022, the Verizon LTE SIM has become locked, causing a comm failure, or secondary path failure.

A device with this issue will show the following symptoms: Locally at the device, the LEDs will flash regularly at a rate of two times per second (see video above). Through AlarmNet360, the affected devices will have checked in normally for the period leading up to March 19, 2022. Then beginning on that date, or on a subsequent date through March 28, 2022, a comm failure will be indicated. Once the comm fail indication appears, it will not clear, so if you've had a comm failure during this time that has restored, then your communication failure is not being caused by this issue.

In addition to the above evidence of an issue, the alarm panel that the communicator is connected to will have a trouble indication displayed. This may come in the form of a Check 103, or a bF on VISTA-20P and similar panels, and also the L3000 panel. For the L3000 panel, the bF will only show on an RF keypad, such as the 5828 or 5828V, the panel itself will show Check or Fault 103. To silence any trouble beeping, enter a disarm command at any panel keypad. These trouble messages can be caused by other things, not just this issue, so if you see one of these error messages and think you may be affected, be sure to contact your alarm dealer for further assistance.

Bear in mind that only the communicators listed above are affected, and that these are all Verizon SIM Cards. If you have an AT&T Communicator, you needn't worry about this issue. Also, for those who have a dual-path communicator with Ethernet connected, you will not necessarily see a Communication Failure message. Instead you will be notified of a Secondary Path Failure. Again, if you are affected by this issue, once the failure occurs, it will not restore. So if you've received a Secondary Path Failure that has since restored, then you experienced a separate issue.

Again, if you feel that you have been affected by this issue, contact your alarm dealer. They can confirm if you are affected and will be able to assist you in receiving a replacement SIM. Alarm Grid customers who are affected have already been contacted and replacement SIMs are on the way. If any further information becomes available, we'll update this post with further details.