The most common way Ugandans are accessing the Internet on PC today is via USB 3G modems . All the major Internet service providers in the country; i.e. Orange, MTN, UTL, Airtel, Warid offer 3G internet albeit at very slow speeds. The modem dongles that are commonly sold are Huawei models. Some like Orange carry ZTE models.
I just pushed a set of Linux bash scripts to my github repositories. These CLI PPP scripts can be used to dial an ISP in Uganda and connect to the Internet. If you are the type of person, who uses the Linux command line interface a lot, then these utilities are for you. As long as you modem is recognized by the kernel, you are good to go.
You can use these scripts to automate your connection. These scripts also, provide several statistics on your USB dongle, such as the EMEI, IMSI numbers, lock status, speed capacity etc.
You can find them at ppp-ug