Yes, at the worst as your Japhar sim could be a v3-v5 sim (if not upgraded to v6), you will just have to process the upgrade of the OS (reflashing the sim inside the box automatically) with the JAM second option.

DM800HDpvr : http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=18330#Post18330

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