Modify FROM header but keeping the CONTACT header the same


Was wondering if someone is able to do the following:

configure a sip.conf file that can modify the From header to use the
caller-id instead of the username, but to keep the Contact header the
same. for example: I want the callerID to be displayed 2125551111 but need to authenticate with 2125554444

From: "2125551111" <> ;tag=as61cbd1db
Contact: sip:2125554444@ sip:2125554444@

Much appreciated.