Hi there, We have a problem running pjsip on Android: our server sets our sip phones to "warning" state, as in the <contact > pjsip delivers the official ip, not the local ip oft he android device. The contact looks like this: <sip:gs.mobile@*ourofficialipfromoutside*:5060;ob> But it should look like <sip:gs.mobile@10.80.40.27:5060;ob> We tried several settings like contact rewrite and played around with NAT config values but we didn't find the clou so far. Can anyone help us out here, which flags we have to set, that <contact> contains the local ip address of the device? ("Leave all default" does not work - we tried that - still our official ip the headers) We use pjsip 2.4.5 On Android 4, 5 and 6 - everywhere the same behavior Transport is TCP Thanks in advance! Cheers, Mike mit freundlichen Grüßen | kind regards Michael Barthold Senior Software Architect ---------------------------------------------------- UNICOPE GmbH | Wien Heiligenstädter Lände 27c A-1190 Wien T +43 5 06216-5285 F +43 5 06216-9285 M +43 699 155 800 54 E michael.barthold@unicope.com<mailto:michael.barthold@unicope.com> ---------------------------------------------------- Zentrale | UNICOPE GmbH Pfongauer Straße 67 A-5202 Neumarkt am Wallersee ---------------------------------------------------- UID: ATU64785735 | Sitz: Neumarkt a. W. FN 322728a | Landesgericht Salzburg DVR: 4013966 ----------------------------------------------------