What they typically do , is deep packet inspection or port blocking. The latter you can divert by changing the default port of 5060, the first can be circumvented by using tls ( then they can't analyse the internals of your packets).
If it still doesn t work you can push everything through a lightweight vpn tunnel like openvpn or tinc. Which is a doable alternative on a laptop , while it is a bit of a challenge on a mobile.
But you could also just change 3g provider ;)
Good luck!
Sent from my iPhone
On 28 Feb 2014, at 05:03, Rene Montilva renemontilva@gmail.com wrote:
Hi List
I'm trying to call over 3G networks, but doesn't work, i think my mobile provider block voip traffic, is there any way to hide voip traffic or jump the provider block rule ?? _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users