I have a 2Talk SIP account setup on my cellphone, and I've just noticed that it no longer connects when on 3G\4G. Works fine as soon if I'm on WiFi, but on either the internet.telecom.co.nz or direct.telecom.co.nz APNs, it will no longer work. It definitely did so in the past but now I just get connection timeouts.
I've tried the native Android functionality and the Bria softphone app. Have also tried forcing 3G instead of 4G, but no dice.
Is port 5060 and/or UDP traffic getting blocked somewhere now?