Hi, I have used it. Some older version of Android I think before Android 4.0 but not sure, does not support TLS so you have to work with older version of TLS or SSL. Security with HTTPS and SSL | Android Developers | | | | | | | | | | | Security with HTTPS and SSL | Android Developers | | | How to enable TLS 1.2 support in an Android application (running on Android 4.1 JB) | | | | | | | | | | | How to enable TLS 1.2 support in an Android application (running on Andr... As per the docs in Android for SSLSocket and SSLContext, TLS v1.1 and v1.2 protocols are supported in API level ... | | | Which Library you are using on Android ? On Wednesday, December 2, 2020, 07:37:02 PM GMT+5, beer Ll <llcfhllml(a)gmail.com> wrote: HelloHas anybody use a android SIP client with TLS client authentication enabled with kamailio?Do you have suggestion ? Many thanks Luca _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users