I'd have a fair signal but regularly not be able to make a call or it would drop... Bettter Half and I took out identical contracts because we call each other alot during the day on my way home etc, and the free Telkom to Telkom minutes pushed us towards Telkom. The catch was that you can hardly ever use them, CONSTANT and I'm not exaggerating, you couldn't make a single call without it going crackly or dropping, pushing me to get an MTN prepaid so I could receive calls from her and now she must buy airtime so we can talk anyway and now, the Telkom sim? Who knows where it is even, I just transfer the included Data to the Missus every month.
I was caught with Cell C ( who didn't have signal in their own store where I took the contract out many moons ago) and now I've been caught by Telkom. MTN has so far had signal virtually everywhere I go with the acceptable low spots here and there which are few and far between.