These are the best and worst mobile networks in South Africa Subscribe MyBroadband Insights has published its 2020 Mobile Network Quality Report, highlighting the best and worst mobile networks in South Africa right now. The report is based on 1.2 million speed tests which were performed by 41,000 MyBroadband Speed Test App users across South Africa between 1 January and 31 December 2020. The research shows that South Africa had an average download speed of 29.33Mbps and an average upload speed of 11.24Mbps last year. MTN had the highest average download speed at 52.84Mbps, followed by Vodacom on 29.39Mbps, Telkom on 21.58Mbps, Cell C on 17.46Mbps, and Rain on 11.90Mbps.