You do not have to miss calls when your phone is off, busy or can not answer calls at that time. Simply divert your calls to 121.
When you are available, dial 123 and follow the voice instructions to listen to the messages of callers, record your personal greeting or change your password
how it works
Manage your voicemail from any other line by dialing 0790000123 or +256790000123 and follow instructions.