Since this post is full of dupes from the other huge thread that no one will have the time to look trought to find the right info, I might as well post my info here too. How to get a valid mac adress to put for the validation. Pick a random number between 126409750144 and 126409842879. (those numbers are in decimal, not hexadecimal). Then google for "convert <number_you_picked> to hexadecimal" without the quotes.Take the hexadecimal result (it will say 0x<some_string> use the <some_string> part) and use it for the validation. edit: you have to add two zeroes to the beginning of it too, see post below. It looks like N810 mac adresses are all in this range, so if you pick a number from here it will work, but the number won't be from anyones specific device, so no one should get in trouble. Took about 5 minutes to find this range trought some trial and error, maybe they should consider getting a more secure validation system :P