"Unassigned Number" message on v550 motorola phone?

When I try to ring out on my phone I keep getting the message "Unassigned Number" why is this and how do I seize past it please? Thanks
Answers:    Suggest you go and get in touch near motorola or your phone service provider.
Link below is for motorola...

https://hellomoto-uk-eng.custhelp.com/cg...

check to make sure the phoen is not on flash two for outgoing calls.

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