Let’s learn How to set the remote kill and remote active?

Remote skill ,This unique function used in situations where the radio has been lost temporarilyor stolen, or your radios rent to others, but they are not returned in time. Then we just remote kill kill the lost/rented/stolen radios,  and the radio can not work ,neither receive nor transmit. This prevents the radio from being used illegally.
Remote active, When the lost radio has been re-located, We can use another device to send he remote active signal, Then  its functions has been all re-activated.

I am so interested in that, The Remote Kill, Remote Active functions provide a safety feature to prevent its unauthorized use.so let us learn how to set it on radios. I choose the RT3 and RT8 as an examples to show hot to set.