Hi Guys,
A customer of mine has a 2865Lac which has real problems with the last few Firmware upgrades. I am running on 4.4.3.2 which is stable and everything works. If i update past this (and have tried nearly every version since) the LTE modem loses the ability to connect. I either get registration denied or SMS service ready with no connection and i then have to downgrade the Firmware back to the one that works. 

Is this happening to anyone else?

I need this device operational all the time as the LTE is failover for Fibre which unfortuantely does drop from time to time and my customer insists on having a backup to keep his card machines working!.

Thanks 

Joe.