I wonder if anyone has any ideas about this one - I changed from a Nexus 5 to a Nexus 6 just after Christmas, so transferred my 2degrees number to a nano sim. The only problem is that apparently I can't receive calls from Vodafone mobiles. I only noticed this after a couple of weeks when I realised I hadn't received a couple of txts from my wife's phone. I assumed that somehow I had caller-blocked her, but after checking all settings (and deleting her contact and making a new one) that didn't seem to be the case.
A bit of further testing showed that I was able to send and receive calls to 2degrees or Spark numbers, and although I was able to call or txt Vodafone numbers, the reverse was not true. Just to double-check that it wasn't a caller-blocking issue I checked with a Vodafone number that had never been in my contacts list with the same result - basically txts never arrive, and any phone calls go straight to a voicemail that I never receive.
I called 2degrees a couple of weeks ago and gave them some specifics, including the times of an instance when a Vodafone number had tried to contact me, and a tech rang me back and said that things looked fine on their end and that he was going to get Vodafone to do something (I had originally ported my number across from Vodafone several years ago). I left it a week and checked again today, but the issue is still continuing - I called 2degrees and they said that the notes on my file just said for me to contact Vodafone now if I was still having problems.
So - before I register a problem with Vodafone (which as I'm not a mobile customer of theirs could be a bit tricky), I thought I would see if anyone had any suggestions about what could be causing the problem. The annoying thing is that I will definitely be missing other calls and txts from Vodafone users that I don't know are trying to contact me, and as far as they are concerned their txt/voice message has been left successfully (no "unable to deliver" txts are sent).
As my wife's headed out of town for a few days with my tester Vodafone mobile, I was thinking of picking up a new prepay Vodafone SIM for checking purposes, and maybe a new 2degrees sim and trying to swap to that. Unfortunately I don't have another nano-sim phone to swap my nexus-6 sim into, but I'm pretty sure it's not a device issue as I can't see how my phone could tell what network callers are from.