Zungumza

Zungumza enables you to connect with family and friends everywhere. Text, call and share photos with anyone, using your existing phone number as your ID. The App syncs with your device’s contacts list automatically detecting any of your contacts that have Zungumza.
Zungumza is free for the initial six months after which you pay a nominal quarterly or annual fee.
The UG version is targeted at users in Uganda. Users from other countries are best off using the App version for their country if available.