The best I have used so far.

So far its good! Started off with MTN prepaid and made the mistake of signing a contract with MTN. The network was terrible especially during peak hours. Telkom mobile with fibre, however, has been amazing, especially considering I am working from home and work stuff requires a lot of data away from home wifi. No glitches, fast internet, video meetings perfect with hotspot. Such great service! It does cost me, but I personally have it as a business expense. I use about 160GB of data from my phone per month, so uncapped plus is perfect, but I assume the same would be true if I got any other mobile plan. No complaints at all!