I was stupid enough to make a Nanosuit-Reboot to get this Reborn Dog Tag. After the Reboot I got it but once I restarted the game, it was gone. Do I have to reboot the Nanosuit again at lvl 50 to unlock it again? Or is there a workaround? Thanks for help.

Search the forum next time. There is a tutorial how to reboot. You've lost the dog tag for ever.

I did search the forum for it (Nanoreboot, Reborn Dog Tag, and several more were the keywords I used) and couldn't find anything. But thanks for the answer. Guess another great achivment made by the bugs Crytek left in this unfinished game.

Yeh man I lost it as well, but if you put it on as soon as you got it it stays there so yeh it's still my dog tag, but as soon as I change it to something else it will be gone forever so I cannot change it! xD

well the reason ur dog tag disapeared is because u didnt reboot in server lobby... therefore your account didnt get updated on cryteks server (for uknown reason, i guess theyll figure out that soon) and is informing u that u dont have it even tho u rebooted. My best reccomendations are always change stuff in server lobby and when u change stuff u will notice its saying "updating account smth" and that means it will save. Thats how i rebooted my nanosuit and i have reborn dog tag. Forever. Be fast. Be strong. Peace out