Hallo !
I want to format nand and then install 2.9.40.
What to do to prevent my license?
Is there any guide for format + netinstall
Netinstall on RB want a serial cable? Can I do netinstall via Ethernet?
Thanks in advance !
format NAND from bios, license is not affected
http://www.mikrotik.com/testdocs/ros/2.9/guide/netinstall.php
Thanks for the answer , but I am sure that I had read in this forum that doing netinstall without ‘‘keep old configuration’’ option , reset the license…
Is this true? 
no, as far as i know it’s not true, license will be kept