@TK_Liew Had this SIM not detected issue occur again on another MAX HD2. SIM 1 working fine, SIM slot 2 reporting no sim. The Reload SIM function didn’t fix it, power cycling the unit didn’t fix it. The SIM had to be popped out slightly and back in to be detected again.
This unit is in an installation where it can’t be moved or touched accidentally so there’s been no physical disturbance to the SIM.
Firmware is 8.1.3 build 5172.