Q: My FaceTime icon disappeared from my iPhone.  Any ideas on how to retrieve it?

FaceTime doesn't appear as a separate app on the iPhone, instead you can access it by going into your contacts, selecting one of them, and then tapping the FaceTime button on it - if you don't the FaceTime button then check that Settings > General > Restrictions > FaceTime isn't 'off'

Good day

i have iphone5 ios7.1.2, i was living in kuwaut and face time was working properly, after i left kuwait and vome to live in nigeria, face time disappear from my phone and cant find it any where when i register nigerian phone number

please advice

You've checked Settings > General > Restrictions to see if it's hidden.

If not then this page has a note against the Middle East heading : iPhone: Wireless carrier support and features

5. FaceTime may be unavailable if your device originates from this region and becomes unlocked or is used in another country.