Waze is the best navigation app, constantly updated by users, so the most up to date. Best for traffic and rerouting by monitoring other users and their reports. Check it out. The more Waze users there are, the more accurate the app is.
I have Cell C fixed LTE with a Huawei B618 router through Afrihost. I consistently get down speeds of 50 mbps and 20 mbps up. I'm in Assagay, Hillcrest, KZN. No problems here.