South Africans pay around six times more for 1GB of data than mobile users in India, while Kenyans pay 10 times more than Indians, says an Opera report.
Nigeria, SA and Ivory Coast are the African countries with the highest mobile and online reading populations in 2018, says a report by Opera Mini.
The Internet browser now has an ad-blocker to enable faster browsing and data savings for Opera Mini users.
The new feature reduces the size of video data, to lessen video loading time and combat buffering delays.
Connecting the millions of Africans that are yet to come online will require tools that are light on Internet usage, says Opera Software.
South Africans using Opera Mini to browse the Web were able to save $65 million over a period of 10 months this year.
One million Nigerian citizens will experience a free day of mobile Internet, thanks to MTN Nigeria, Opera Software and Naij.com.
The software company hopes to double its smartphone user base by the end of 2017.
Mobile figures for the browser have topped 200 million per month, with a strong focus on African usage and growth.
Opera Mini 6.5 and Mobile 11.5 can be downloaded today, while Opera 12 Alpha will debut on Thursday.
The operator signs a deal with Norway's Opera Software to offer the Opera Mini mobile browser.
Global mobile data traffic has boomed, rising 134% in the past year, says mobile Internet browser firm Opera Software ASA.