Hello I am using Pjsip 2.7 on iOS Platform. I implemented the latest handle IP changes and it works fine and I can continue on the same call if the old IP and the new IP has the same version i.e IPV4 to IPV4 or IPV6 to IPV6. If old IP is IPV4 version and new IP is the IPV6 version the handle IP change tries to connect with self-assigned IP address(169.254.xxx.xxx). I tried manually handling the ID change shutting down the existing transport creating new transport with IPV6 and that PJSIP is returning the following error. *Failed to send Request msg REGISTER/cseq=64682 (tdta0x1079a16a8)! err=171064 (Unsuitable transport selected (PJSIP_ETPNOTSUITABLE))* Here in the US most of the Moblie network on LTE has stopped supporting IPV4 they only support IPV6. Can we support IPV4 to IPV6 IP change? Thanks Dheeraj Katarya