i can make the registration code clear the pco value when not registered and set it to the previous non empty value when it gets registered again  we can basically always update the pco value using the testing interface  testing py  and keep the value around do you need an api to set the action value specifically  i e  not the entire string  just the action value if so  which character s  correspond to it  also  are these values carrier specific  if they are  then let us make the pseudomm   dumb   and always use an explicitly set value through mm  i testing 