It would probably be best if you contact VZ directly to find this info out.
As kaebfly said, it's best to just call Verizon with this stuff.
However, if you have an old smartphone lying around, I would try to activate that and see if a warning comes up. These promos are very sensitive as far as things you can change with them.
You will lose your Smartphone's Talk Free promotion if you activate a feature phone on the line.
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