Just been trying VoIP using WxC VFX service over Telecom XT network. Alas it seems a big fail. A Linksys SPA2102 --> a 3G HSPA router.
Registers ok, but within 5 seconds of making a phone call, the call drops. This setup works perfectly over Vodafone, so puzzled as to why it is a complete failure on XT.
Are Telecom actively killing VoIP?
Tried APNs direct & internet(.telecom.co.nz)