Hi, I need pjsip to reregister to the server when there is a network change as soon as possible. To do this, I am calling "pjsua_acc_set_registration" to updated the registration when the app resumes from the background (it is an iPhone app). By looking at the log files, I noticed the "Via" is still showing the old IP address in the reregister request, so the response from the server times-out in pjsip and it takes a long time for pjsip to notice the mobile device has a new IP address. Is there a setting or another function that I could call to speed up the IP address change detection? Alex.