This service has been discontinued, you can see more details here.
If you are a Nigerian studying or residing in any west African country where Glo coverage is available, you can now recharge a Nigerian Glo card in your Glo sim in that country.
To recharge a Nigerian Glo card on your Ghana line simply dial: *123*234*Recharge Code#
Example: *123*234*152037711266634#
As seen on uniXclusive.