ICloud keychain on Mavericks in Ukraine
When I try to set up ICloud keychain on Mavericks, it's prompting me for the phone number, but I can't see my country in the drop-down list. I live in Ukraine. I see every other coutry, but not Ukraine. Why is that? How can I get it registered then, and how critical is the valid phone number?
MacBook Pro, OS X Mavericks (10.9)