0
Try to
-See this topic and follow (Flashing by Null modem cable only without Network lan) method and select loader (LD1 for sim2)
[Only registered and activated users can see links You are not allowed to view links. Register or Login to view.]
-select repair no ca found and choose (DM800se-sim2.10-ss84b)
-click do job
Now
-open box cover
-press and hold on sim (don't remove your finger)
-Turn power on to box
after finish repair unplug and plug box and also press and hold on sim ... then see the result