Hi Ajeh,
To answer your question, we would need the shipping phone number associated with the current order. However, I think this really should be a require field when creating addresses. Since customers can create multiple addresses (either for billing or shipping), it should be required for both. The phone number should be carried through to the order along with the rest of the shipping info.
I have had to add this to older osc stores and was hoping that the Zen team had added it to the core code. It's one of those keeping up with UPS shipping requirement sort of things. Just like a note stating that UPS will not ship to a PO box, which is something else I always have to add...
Thanks