Telkom mobile on MTN Roaming in LTE coverage area

Just to clarify... From my experience the past few months in Midrand and Centurion... Telkom 3G coverage (as shown on their map) means you have zero internet and Telkom 4G coverage means 4G sometimes, no fail-over to 3G, straight to MTN roaming in the middle of a LTE coverage zone, which incidentally also means zero internet.

So Telkom Freeme 10 Gb = 1Gb = 0 Gb so might as well pay for 2 or 5Gb somewhere else and at least have internet