No alternative
There has been much discussion regarding the death of premi-cells recently. However there are no real alternatives for the low end of the SME market.
VOIP products and services usually have a break even point, requiring X amount of spend before becoming a viable option.
To date, I have not seen a premi-cell alternative for customers spending less than R7500 on mobile calls. VOX, Vodacom Business, etc have great IP platforms however do not have a solution for this portion of the market.
Discounted premi-cells, provide cheaper calls to networks at a low-entry. Until such time as dedicated bandwidth is viable, the premi-cell market will continue to fight for its last dying breath.
I know that we as a voice provider have already migrated customers over to IP solution where possible. The rest ... discounted subs and call rates on premi-cells. We dont make as much money, however we offer a service to the customers whereby there is a saving and a month-to-month contract where we can migrate them if we see another option.