This creates the interface in path "/phonesim", which might appear in phonesim configuration file or not. As this is in fact for creating/removing phonesim type modems, maybe we should not associate this with a particular instance and instead create a new interface (org.ofono.PhonesimManager?) for path "/" (see $OFONO/manager-api.txt for an interface created in "/").

Another option would be to create this interface for all phonesim instances, with path returned by __ofono_atom_get_path() which would make all modems equal, although I prefer the former.