Well done acmSr4 !

The issue here is that your image is for the Original box, and not a clone box as you have, SR4 model DM800HDse clone.

If you replace the sim with an original (called A8P), then you could use it, otherwise if you keep the sim as you have today you could face "incompatibilities" as you see.

The security against clones on an original image are at different levels, and its not possible to predict it, as it all depends of the software used to compile it.

Drivers are into /lib/modules in the box,

Admin