Verizon SIMs no longer work after july 26

[Jeff Tuctronics]

Hello.  On july 26 at the same hour, about 30 of our cellular modems stopped sending data.  They are all using Verizon firmware.  The units using Hologram firmware are still working.  Some of the Verizons are still working as well.  Is there some known issue about this?

[rajeev]

You should check with Verizon directly. Also, I think you meant "they are using Verizon SIMS" not firmware, right?

I hope they not blacklisted the devices or something.