I am on 2D having ported a contract from VF. My daughter has a 2D SIM card, Yesterday I sent her 4 texts and tried to call her serveral times. No texts got through and all calls either went dead or to VM.
I was pretty annoyed since I thought he was ignoring me(!) but in fact none of my messages had got through until serveral hours later when she powered her phone off and on again. She didn't know there were any problems because she had been texting her friends on VF and TC okay.
This is a bit worrying. I moved to 2D since I could port my number but if this is the sort of issue I could be facing I might not be around long which is a shame since the plans are so good.