Yup. Having the same issue as well. I had to perform a Reset All Settings on my two phones and since then, I cannot get the code to pop up on my phone or iPad. The strange thing is that if I select to have iMessages show up on the phone by selecting the second phone number, I can get the pop-up to appear, but it will say the code is "(null)".
Any thoughts on getting this to work will be nice. I hate having to carry two phones (work and personal).
- Merg