From http://www.statssa.gov.za/publications/P0318/P03182015.pdf
Statistical release P0318
The survey (GHS) found that there was high access to telecommunications for households nationally, as only 3,5% of households did not have access to either landlines or cellular phones in 2015. By comparison, 85,5% of households had access to at least one cellular phone, while 10,9% of households had access to both a landline and a cellular phone. Only 0,1% of households had only a landline. However access to these means of communication differed by province. Households in historically rural provinces such as Mpumalanga (94,4%) and Limpopo (94,1%) were very reliant on the more accessible cellular telephones than landlines. By contrast, a combination of both cellular phones and landlines in households were most prevalent in the more affluent provinces, namely Western Cape (26,2%) and Gauteng (14,1%). Half of South African households (53,5%) had at least one member who used the Internet either at home, workplace, place of study, or Internet cafés. More than half of households in Gauteng (65,7%) and Western Cape (63,3%) had access to the
85,5% of South African households had the use of only cellular phones in their dwellings/ households
Western Cape had the lowest percentage of households who had only cellular phones in their dwellings (69,2%)
The places where the largest percentages of South Africans tend to access the Internet include, at work (15,1%), within the household/ at home (9,7%), and at school/university/college (5,1%).
Households in Western Cape (21,4%) and Gauteng(15,6%) were most likely to access the Internet at home
Households in Gauteng and Western Cape were most likely to access the Internet at work.
Using mobile devices to access the Internet comprises access on cellular telephones or using mobile access devices such as 3G cards. ... Whereas only 2,1%, 3,7% and 3,1% of households respectively had access to the Internet at home, at work and elsewhere, More than a third (33,7%) had access through mobile devices. Mobile devices also created opportunities in urban areas where larger proportions of urban and metropolitan households had access to the Internet through mobile devices in Western Cape and Gauteng.