I'm curious how SER associates flags to specific phone calls, i'm just trying to understand in what situations a flag would be associated to a SIP message.

So far i've assumed that its message specific, as in when a SIP message comes into SER any flags set while it traverses through the SER script are only in effect during its traversal through the script, once the message is routed all flags are forgotten.

Except in the special case of "lookup()" where a flag can be associated to a message when "save()" is called