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First try to download last version for optiflasher..
Second go to this thread and follow this:
1-use " 1-Null modem cable only without Network lan." and then select Repair "No Ca Found" and choose "Dm800-sim2.01-SSl84b" and continue.
2-After turn off and on box use "Flashing by Network lan only" to flash new image "make sure right one for your sim..
Second go to this thread and follow this:
1-use " 1-Null modem cable only without Network lan." and then select Repair "No Ca Found" and choose "Dm800-sim2.01-SSl84b" and continue.
2-After turn off and on box use "Flashing by Network lan only" to flash new image "make sure right one for your sim..