modem_conf__Phonesim

Hi, I am writing, because I found in software version history, that from commit “7c2529077cb885d8fb4c50b6696c53c2b4e5d20b" (Release 0.34) Modem.conf should not be used to configure ofono with phonesim(“phonesim: Don't use modem.conf for phonesim modems") I want to configure ofono(release 0.36) with phonesim. How can I do this, if shouldn’t use modem.conf? I will be very grateful, if you help me. Thank you in advance and Best Regards, Radek