Hi Benny, I am currently integrating PJSIP into Mozilla Firefox in order to achieve HTTP Session Mobility using SIP. My research intention is to transfer web sessions between web browsers using SIP. Though I planned sending the data(contents of cookies, rewritten URL, hidden element) via SIP INFO, at present, I am sending the data as IM(Instant Messaging). While I have accomplished the task of transferring URL from a browser's addressbar to another as IM data using pjsua_im_send(), I haven't been able to retrieve the data at the destination browser. I wish you had a function like pjsua_im_send() that can help retrieve such data. I tried couple of things such as trying to implement the callback, getting value of "msg" attribute in the IM message struct pjsua_msg_data/pjsip_rx_data but all were futile. Do you know if such data is stored in variable not listed in the PJSUA module/API? Your contributions are welcome. Mike.