Hop Mobile

[Przemolog]

Originally Posted by VladS

The 'home' country for HopMobile is not Monaco but Ghana.

Regarding coverage in Monaco, it is fully covered by all french networks so you should be able to roam just fine.

Yes, Hop uses Monaco numbers but Ghana's Areeba provides roaming agreements for Hop (this is probably the reason of its good coverage in Africa).
AFAIK Monaco Telecom doesn't have coverage in its own country but has its towers in UN-governed Serbian province of Kosovo - this is Monaco KFOR.
AFAIR Monaco Telecom is service provider also somewhere in Africa (and some mobile African networks may have +377 country code, too)