Thank you dd_engi!
Can you confirm that your device starts with B005 serial (as mine), and... is there some user with Kindle DXi, who already apply the hack, and is confirmed safe

Sorry for my question, but I didn't do that and I'm afraid for my new device
Can you help with some exact help, step by step or... can you write briefly how to proceed with the hack? I suppose that it is not just simple as "copy all the files in the root of the Kindle and start it...". Is there some written howto?
Thank you again and thank you all you guys from that forum